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Finding the Fourth Proportional to 987.96, 1,480.50 and 410.52

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Solution

The fourth proportional to 987.96, 1,480.50 and 410.52 is: 615.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.96 : 1,480.50 = 410.52 : x
  2. Step 2: Convert to fraction form
    987.96/1,480.50 = 410.52/x
  3. Step 3: Cross multiply
    987.96x = 1,480.50 × 410.52
  4. Step 4: Simplify right side
    987.96x = 607,774.86
  5. Step 5: Solve for x
    x = 607,774.86/987.96
  6. Step 6: Final answer
    x = 615.18

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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.