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Finding the Fourth Proportional to 431,063.26, 646,594.90 and 131,545.40

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Solution

The fourth proportional to 431,063.26, 646,594.90 and 131,545.40 is: 197,318.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,063.26 : 646,594.90 = 131,545.40 : x
  2. Step 2: Convert to fraction form
    431,063.26/646,594.90 = 131,545.40/x
  3. Step 3: Cross multiply
    431,063.26x = 646,594.90 × 131,545.40
  4. Step 4: Simplify right side
    431,063.26x = 85,056,586,046.08
  5. Step 5: Solve for x
    x = 85,056,586,046.08/431,063.26
  6. Step 6: Final answer
    x = 197,318.11

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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.