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Finding the Fourth Proportional to 987.57, 1,480.03 and 500.96

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Solution

The fourth proportional to 987.57, 1,480.03 and 500.96 is: 750.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.57 : 1,480.03 = 500.96 : x
  2. Step 2: Convert to fraction form
    987.57/1,480.03 = 500.96/x
  3. Step 3: Cross multiply
    987.57x = 1,480.03 × 500.96
  4. Step 4: Simplify right side
    987.57x = 741,435.83
  5. Step 5: Solve for x
    x = 741,435.83/987.57
  6. Step 6: Final answer
    x = 750.77

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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.