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Finding the Fourth Proportional to 492,221.80, 738,332.70 and 281,686.60

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Solution

The fourth proportional to 492,221.80, 738,332.70 and 281,686.60 is: 422,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,221.80 : 738,332.70 = 281,686.60 : x
  2. Step 2: Convert to fraction form
    492,221.80/738,332.70 = 281,686.60/x
  3. Step 3: Cross multiply
    492,221.80x = 738,332.70 × 281,686.60
  4. Step 4: Simplify right side
    492,221.80x = 207,978,427,931.82
  5. Step 5: Solve for x
    x = 207,978,427,931.82/492,221.80
  6. Step 6: Final answer
    x = 422,529.90

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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.