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Finding the Fourth Proportional to 665,911.32, 998,876.28 and 216,634.56

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Solution

The fourth proportional to 665,911.32, 998,876.28 and 216,634.56 is: 324,954.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,911.32 : 998,876.28 = 216,634.56 : x
  2. Step 2: Convert to fraction form
    665,911.32/998,876.28 = 216,634.56/x
  3. Step 3: Cross multiply
    665,911.32x = 998,876.28 × 216,634.56
  4. Step 4: Simplify right side
    665,911.32x = 216,391,123,412.24
  5. Step 5: Solve for x
    x = 216,391,123,412.24/665,911.32
  6. Step 6: Final answer
    x = 324,954.87

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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.