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Finding the Fourth Proportional to 626,363.52, 864,020.16 and 399,753.60

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Solution

The fourth proportional to 626,363.52, 864,020.16 and 399,753.60 is: 551,429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,363.52 : 864,020.16 = 399,753.60 : x
  2. Step 2: Convert to fraction form
    626,363.52/864,020.16 = 399,753.60/x
  3. Step 3: Cross multiply
    626,363.52x = 864,020.16 × 399,753.60
  4. Step 4: Simplify right side
    626,363.52x = 345,395,169,432.58
  5. Step 5: Solve for x
    x = 345,395,169,432.58/626,363.52
  6. Step 6: Final answer
    x = 551,429.26

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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.