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Finding the Fourth Proportional to 424,158.97, 636,071.05 and 171,391.81

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Solution

The fourth proportional to 424,158.97, 636,071.05 and 171,391.81 is: 257,020.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,158.97 : 636,071.05 = 171,391.81 : x
  2. Step 2: Convert to fraction form
    424,158.97/636,071.05 = 171,391.81/x
  3. Step 3: Cross multiply
    424,158.97x = 636,071.05 × 171,391.81
  4. Step 4: Simplify right side
    424,158.97x = 109,017,368,548.10
  5. Step 5: Solve for x
    x = 109,017,368,548.10/424,158.97
  6. Step 6: Final answer
    x = 257,020.07

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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.