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Finding the Fourth Proportional to 667,318.30, 998,644.65 and 611,331.10

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Solution

The fourth proportional to 667,318.30, 998,644.65 and 611,331.10 is: 914,859.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,318.30 : 998,644.65 = 611,331.10 : x
  2. Step 2: Convert to fraction form
    667,318.30/998,644.65 = 611,331.10/x
  3. Step 3: Cross multiply
    667,318.30x = 998,644.65 × 611,331.10
  4. Step 4: Simplify right side
    667,318.30x = 610,502,532,393.62
  5. Step 5: Solve for x
    x = 610,502,532,393.62/667,318.30
  6. Step 6: Final answer
    x = 914,859.57

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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.