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Finding the Fourth Proportional to 1,324.15, 1,987.04 and 502.54

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Solution

The fourth proportional to 1,324.15, 1,987.04 and 502.54 is: 754.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.15 : 1,987.04 = 502.54 : x
  2. Step 2: Convert to fraction form
    1,324.15/1,987.04 = 502.54/x
  3. Step 3: Cross multiply
    1,324.15x = 1,987.04 × 502.54
  4. Step 4: Simplify right side
    1,324.15x = 998,567.08
  5. Step 5: Solve for x
    x = 998,567.08/1,324.15
  6. Step 6: Final answer
    x = 754.12

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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.