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Finding the Fourth Proportional to 1,324.56, 1,987.08 and 458.96

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Solution

The fourth proportional to 1,324.56, 1,987.08 and 458.96 is: 688.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.56 : 1,987.08 = 458.96 : x
  2. Step 2: Convert to fraction form
    1,324.56/1,987.08 = 458.96/x
  3. Step 3: Cross multiply
    1,324.56x = 1,987.08 × 458.96
  4. Step 4: Simplify right side
    1,324.56x = 911,990.24
  5. Step 5: Solve for x
    x = 911,990.24/1,324.56
  6. Step 6: Final answer
    x = 688.52

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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.