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Finding the Fourth Proportional to 916,851,489.20, 1,375,277,233.80 and 626,613,844.40

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Solution

The fourth proportional to 916,851,489.20, 1,375,277,233.80 and 626,613,844.40 is: 939,920,766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,851,489.20 : 1,375,277,233.80 = 626,613,844.40 : x
  2. Step 2: Convert to fraction form
    916,851,489.20/1,375,277,233.80 = 626,613,844.40/x
  3. Step 3: Cross multiply
    916,851,489.20x = 1,375,277,233.80 × 626,613,844.40
  4. Step 4: Simplify right side
    916,851,489.20x = 861,767,754,587,215,616
  5. Step 5: Solve for x
    x = 861,767,754,587,215,616/916,851,489.20
  6. Step 6: Final answer
    x = 939,920,766.60

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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.