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Finding the Fourth Proportional to 424,139.04, 636,296.04 and 143,649

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Solution

The fourth proportional to 424,139.04, 636,296.04 and 143,649 is: 215,503.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,139.04 : 636,296.04 = 143,649 : x
  2. Step 2: Convert to fraction form
    424,139.04/636,296.04 = 143,649/x
  3. Step 3: Cross multiply
    424,139.04x = 636,296.04 × 143,649
  4. Step 4: Simplify right side
    424,139.04x = 91,403,289,849.96
  5. Step 5: Solve for x
    x = 91,403,289,849.96/424,139.04
  6. Step 6: Final answer
    x = 215,503.13

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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.