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Finding the Fourth Proportional to 1,324.75, 1,987.91 and 503.71

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Solution

The fourth proportional to 1,324.75, 1,987.91 and 503.71 is: 755.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.75 : 1,987.91 = 503.71 : x
  2. Step 2: Convert to fraction form
    1,324.75/1,987.91 = 503.71/x
  3. Step 3: Cross multiply
    1,324.75x = 1,987.91 × 503.71
  4. Step 4: Simplify right side
    1,324.75x = 1,001,322.66
  5. Step 5: Solve for x
    x = 1,001,322.66/1,324.75
  6. Step 6: Final answer
    x = 755.86

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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.