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Finding the Fourth Proportional to 424,158.72, 636,070.68 and 171,391.56

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Solution

The fourth proportional to 424,158.72, 636,070.68 and 171,391.56 is: 257,019.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,158.72 : 636,070.68 = 171,391.56 : x
  2. Step 2: Convert to fraction form
    424,158.72/636,070.68 = 171,391.56/x
  3. Step 3: Cross multiply
    424,158.72x = 636,070.68 × 171,391.56
  4. Step 4: Simplify right side
    424,158.72x = 109,017,146,115.46
  5. Step 5: Solve for x
    x = 109,017,146,115.46/424,158.72
  6. Step 6: Final answer
    x = 257,019.70

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1.5x scale

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.