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Finding the Fourth Proportional to 922,415.20, 1,382,854.80 and 390,344.80

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Solution

The fourth proportional to 922,415.20, 1,382,854.80 and 390,344.80 is: 585,192.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,415.20 : 1,382,854.80 = 390,344.80 : x
  2. Step 2: Convert to fraction form
    922,415.20/1,382,854.80 = 390,344.80/x
  3. Step 3: Cross multiply
    922,415.20x = 1,382,854.80 × 390,344.80
  4. Step 4: Simplify right side
    922,415.20x = 539,790,180,335.04
  5. Step 5: Solve for x
    x = 539,790,180,335.04/922,415.20
  6. Step 6: Final answer
    x = 585,192.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.