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Finding the Fourth Proportional to 1,161,215,147.90, 1,602,476,197.62 and 639,694,379.90

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Solution

The fourth proportional to 1,161,215,147.90, 1,602,476,197.62 and 639,694,379.90 is: 882,777,855.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161,215,147.90 : 1,602,476,197.62 = 639,694,379.90 : x
  2. Step 2: Convert to fraction form
    1,161,215,147.90/1,602,476,197.62 = 639,694,379.90/x
  3. Step 3: Cross multiply
    1,161,215,147.90x = 1,602,476,197.62 × 639,694,379.90
  4. Step 4: Simplify right side
    1,161,215,147.90x = 1,025,095,017,541,035,648
  5. Step 5: Solve for x
    x = 1,025,095,017,541,035,648/1,161,215,147.90
  6. Step 6: Final answer
    x = 882,777,855.07

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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.