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Finding the Fourth Proportional to 916,851,489.70, 1,375,277,234.55 and 626,613,844.90

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Solution

The fourth proportional to 916,851,489.70, 1,375,277,234.55 and 626,613,844.90 is: 939,920,767.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,851,489.70 : 1,375,277,234.55 = 626,613,844.90 : x
  2. Step 2: Convert to fraction form
    916,851,489.70/1,375,277,234.55 = 626,613,844.90/x
  3. Step 3: Cross multiply
    916,851,489.70x = 1,375,277,234.55 × 626,613,844.90
  4. Step 4: Simplify right side
    916,851,489.70x = 861,767,755,744,814,592
  5. Step 5: Solve for x
    x = 861,767,755,744,814,592/916,851,489.70
  6. Step 6: Final answer
    x = 939,920,767.35

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Double scale
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Similar ratio
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1.5x scale

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.