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Finding the Fourth Proportional to 1,230.24, 1,843.80 and 499.40

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Solution

The fourth proportional to 1,230.24, 1,843.80 and 499.40 is: 748.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.24 : 1,843.80 = 499.40 : x
  2. Step 2: Convert to fraction form
    1,230.24/1,843.80 = 499.40/x
  3. Step 3: Cross multiply
    1,230.24x = 1,843.80 × 499.40
  4. Step 4: Simplify right side
    1,230.24x = 920,793.72
  5. Step 5: Solve for x
    x = 920,793.72/1,230.24
  6. Step 6: Final answer
    x = 748.47

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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.