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Finding the Fourth Proportional to 1,390,473,229.76, 1,919,017,558.16 and 825,960,341.71

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Solution

The fourth proportional to 1,390,473,229.76, 1,919,017,558.16 and 825,960,341.71 is: 1,139,922,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,473,229.76 : 1,919,017,558.16 = 825,960,341.71 : x
  2. Step 2: Convert to fraction form
    1,390,473,229.76/1,919,017,558.16 = 825,960,341.71/x
  3. Step 3: Cross multiply
    1,390,473,229.76x = 1,919,017,558.16 × 825,960,341.71
  4. Step 4: Simplify right side
    1,390,473,229.76x = 1,585,032,398,076,396,032
  5. Step 5: Solve for x
    x = 1,585,032,398,076,396,032/1,390,473,229.76
  6. Step 6: Final answer
    x = 1,139,922,987.48

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Double scale
Find fourth proportional to 1,390,473,230.76, 1,919,017,559.54 and 825,960,342.71
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.