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Finding the Fourth Proportional to 424,259.98, 636,254.80 and 139,897.53

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Solution

The fourth proportional to 424,259.98, 636,254.80 and 139,897.53 is: 209,801.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,259.98 : 636,254.80 = 139,897.53 : x
  2. Step 2: Convert to fraction form
    424,259.98/636,254.80 = 139,897.53/x
  3. Step 3: Cross multiply
    424,259.98x = 636,254.80 × 139,897.53
  4. Step 4: Simplify right side
    424,259.98x = 89,010,474,620.90
  5. Step 5: Solve for x
    x = 89,010,474,620.90/424,259.98
  6. Step 6: Final answer
    x = 209,801.72

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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.