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Finding the Fourth Proportional to 424,387.36, 636,588.96 and 339,754.42

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Solution

The fourth proportional to 424,387.36, 636,588.96 and 339,754.42 is: 509,637.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,387.36 : 636,588.96 = 339,754.42 : x
  2. Step 2: Convert to fraction form
    424,387.36/636,588.96 = 339,754.42/x
  3. Step 3: Cross multiply
    424,387.36x = 636,588.96 × 339,754.42
  4. Step 4: Simplify right side
    424,387.36x = 216,283,912,883.20
  5. Step 5: Solve for x
    x = 216,283,912,883.20/424,387.36
  6. Step 6: Final answer
    x = 509,637.97

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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.