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Finding the Fourth Proportional to 659,123.60, 987,907.80 and 492,717.20

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Solution

The fourth proportional to 659,123.60, 987,907.80 and 492,717.20 is: 738,494.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,123.60 : 987,907.80 = 492,717.20 : x
  2. Step 2: Convert to fraction form
    659,123.60/987,907.80 = 492,717.20/x
  3. Step 3: Cross multiply
    659,123.60x = 987,907.80 × 492,717.20
  4. Step 4: Simplify right side
    659,123.60x = 486,759,165,074.16
  5. Step 5: Solve for x
    x = 486,759,165,074.16/659,123.60
  6. Step 6: Final answer
    x = 738,494.52

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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.