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Finding the Fourth Proportional to 659,179.89, 987,639.72 and 442,632.70

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Solution

The fourth proportional to 659,179.89, 987,639.72 and 442,632.70 is: 663,190.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,179.89 : 987,639.72 = 442,632.70 : x
  2. Step 2: Convert to fraction form
    659,179.89/987,639.72 = 442,632.70/x
  3. Step 3: Cross multiply
    659,179.89x = 987,639.72 × 442,632.70
  4. Step 4: Simplify right side
    659,179.89x = 437,161,635,465.52
  5. Step 5: Solve for x
    x = 437,161,635,465.52/659,179.89
  6. Step 6: Final answer
    x = 663,190.19

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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.