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Finding the Fourth Proportional to 321,471.79, 482,207.69 and 108,221.87

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Solution

The fourth proportional to 321,471.79, 482,207.69 and 108,221.87 is: 162,332.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,471.79 : 482,207.69 = 108,221.87 : x
  2. Step 2: Convert to fraction form
    321,471.79/482,207.69 = 108,221.87/x
  3. Step 3: Cross multiply
    321,471.79x = 482,207.69 × 108,221.87
  4. Step 4: Simplify right side
    321,471.79x = 52,185,416,703.84
  5. Step 5: Solve for x
    x = 52,185,416,703.84/321,471.79
  6. Step 6: Final answer
    x = 162,332.80

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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.