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Finding the Fourth Proportional to 424,457.39, 635,938.71 and 399,172.42

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Solution

The fourth proportional to 424,457.39, 635,938.71 and 399,172.42 is: 598,055.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,457.39 : 635,938.71 = 399,172.42 : x
  2. Step 2: Convert to fraction form
    424,457.39/635,938.71 = 399,172.42/x
  3. Step 3: Cross multiply
    424,457.39x = 635,938.71 × 399,172.42
  4. Step 4: Simplify right side
    424,457.39x = 253,849,195,385.75
  5. Step 5: Solve for x
    x = 253,849,195,385.75/424,457.39
  6. Step 6: Final answer
    x = 598,055.78

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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.