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Finding the Fourth Proportional to 664,793.64, 916,949.70 and 449,839.08

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Solution

The fourth proportional to 664,793.64, 916,949.70 and 449,839.08 is: 620,462.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,793.64 : 916,949.70 = 449,839.08 : x
  2. Step 2: Convert to fraction form
    664,793.64/916,949.70 = 449,839.08/x
  3. Step 3: Cross multiply
    664,793.64x = 916,949.70 × 449,839.08
  4. Step 4: Simplify right side
    664,793.64x = 412,479,809,454.28
  5. Step 5: Solve for x
    x = 412,479,809,454.28/664,793.64
  6. Step 6: Final answer
    x = 620,462.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.