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Finding the Fourth Proportional to 425,761,605.20, 638,642,407.80 and 382,679,454.80

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Solution

The fourth proportional to 425,761,605.20, 638,642,407.80 and 382,679,454.80 is: 574,019,182.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,761,605.20 : 638,642,407.80 = 382,679,454.80 : x
  2. Step 2: Convert to fraction form
    425,761,605.20/638,642,407.80 = 382,679,454.80/x
  3. Step 3: Cross multiply
    425,761,605.20x = 638,642,407.80 × 382,679,454.80
  4. Step 4: Simplify right side
    425,761,605.20x = 244,395,328,429,063,264
  5. Step 5: Solve for x
    x = 244,395,328,429,063,264/425,761,605.20
  6. Step 6: Final answer
    x = 574,019,182.20

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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.