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Finding the Fourth Proportional to 424,389.36, 636,591.96 and 339,756.42

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Solution

The fourth proportional to 424,389.36, 636,591.96 and 339,756.42 is: 509,640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,389.36 : 636,591.96 = 339,756.42 : x
  2. Step 2: Convert to fraction form
    424,389.36/636,591.96 = 339,756.42/x
  3. Step 3: Cross multiply
    424,389.36x = 636,591.96 × 339,756.42
  4. Step 4: Simplify right side
    424,389.36x = 216,286,205,330.38
  5. Step 5: Solve for x
    x = 216,286,205,330.38/424,389.36
  6. Step 6: Final answer
    x = 509,640.97

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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.