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Finding the Fourth Proportional to 281,386, 422,079 and 84,394

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Solution

The fourth proportional to 281,386, 422,079 and 84,394 is: 126,591

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,386 : 422,079 = 84,394 : x
  2. Step 2: Convert to fraction form
    281,386/422,079 = 84,394/x
  3. Step 3: Cross multiply
    281,386x = 422,079 × 84,394
  4. Step 4: Simplify right side
    281,386x = 35,620,935,126
  5. Step 5: Solve for x
    x = 35,620,935,126/281,386
  6. Step 6: Final answer
    x = 126,591

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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.