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Finding the Fourth Proportional to 391,695.38, 540,491.26 and 238,677.82

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Solution

The fourth proportional to 391,695.38, 540,491.26 and 238,677.82 is: 329,345.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,695.38 : 540,491.26 = 238,677.82 : x
  2. Step 2: Convert to fraction form
    391,695.38/540,491.26 = 238,677.82/x
  3. Step 3: Cross multiply
    391,695.38x = 540,491.26 × 238,677.82
  4. Step 4: Simplify right side
    391,695.38x = 129,003,275,665.85
  5. Step 5: Solve for x
    x = 129,003,275,665.85/391,695.38
  6. Step 6: Final answer
    x = 329,345.92

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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.