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Finding the Fourth Proportional to 491,812.80, 737,719.20 and 281,860.80

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Solution

The fourth proportional to 491,812.80, 737,719.20 and 281,860.80 is: 422,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,812.80 : 737,719.20 = 281,860.80 : x
  2. Step 2: Convert to fraction form
    491,812.80/737,719.20 = 281,860.80/x
  3. Step 3: Cross multiply
    491,812.80x = 737,719.20 × 281,860.80
  4. Step 4: Simplify right side
    491,812.80x = 207,934,123,887.36
  5. Step 5: Solve for x
    x = 207,934,123,887.36/491,812.80
  6. Step 6: Final answer
    x = 422,791.20

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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.