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Finding the Fourth Proportional to 1,230.38, 1,843.94 and 499.55

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Solution

The fourth proportional to 1,230.38, 1,843.94 and 499.55 is: 748.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.38 : 1,843.94 = 499.55 : x
  2. Step 2: Convert to fraction form
    1,230.38/1,843.94 = 499.55/x
  3. Step 3: Cross multiply
    1,230.38x = 1,843.94 × 499.55
  4. Step 4: Simplify right side
    1,230.38x = 921,128.51
  5. Step 5: Solve for x
    x = 921,128.51/1,230.38
  6. Step 6: Final answer
    x = 748.66

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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.