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Finding the Fourth Proportional to 396,424.72, 547,070.12 and 215,138.22

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Solution

The fourth proportional to 396,424.72, 547,070.12 and 215,138.22 is: 296,892.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,424.72 : 547,070.12 = 215,138.22 : x
  2. Step 2: Convert to fraction form
    396,424.72/547,070.12 = 215,138.22/x
  3. Step 3: Cross multiply
    396,424.72x = 547,070.12 × 215,138.22
  4. Step 4: Simplify right side
    396,424.72x = 117,695,691,831.99
  5. Step 5: Solve for x
    x = 117,695,691,831.99/396,424.72
  6. Step 6: Final answer
    x = 296,892.92

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1.5x scale

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.