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Finding the Fourth Proportional to 307,148.91, 424,081.62 and 215,463.12

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Solution

The fourth proportional to 307,148.91, 424,081.62 and 215,463.12 is: 297,490.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,148.91 : 424,081.62 = 215,463.12 : x
  2. Step 2: Convert to fraction form
    307,148.91/424,081.62 = 215,463.12/x
  3. Step 3: Cross multiply
    307,148.91x = 424,081.62 × 215,463.12
  4. Step 4: Simplify right side
    307,148.91x = 91,373,948,979.85
  5. Step 5: Solve for x
    x = 91,373,948,979.85/307,148.91
  6. Step 6: Final answer
    x = 297,490.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.