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Finding the Fourth Proportional to 391,471.28, 587,041.68 and 121,566.32

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Solution

The fourth proportional to 391,471.28, 587,041.68 and 121,566.32 is: 182,298.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,471.28 : 587,041.68 = 121,566.32 : x
  2. Step 2: Convert to fraction form
    391,471.28/587,041.68 = 121,566.32/x
  3. Step 3: Cross multiply
    391,471.28x = 587,041.68 × 121,566.32
  4. Step 4: Simplify right side
    391,471.28x = 71,364,496,724.22
  5. Step 5: Solve for x
    x = 71,364,496,724.22/391,471.28
  6. Step 6: Final answer
    x = 182,298.17

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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.