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Finding the Fourth Proportional to 987, 1,480.58 and 402.04

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Solution

The fourth proportional to 987, 1,480.58 and 402.04 is: 603.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    987 : 1,480.58 = 402.04 : x
  2. Step 2: Convert to fraction form
    987/1,480.58 = 402.04/x
  3. Step 3: Cross multiply
    987x = 1,480.58 × 402.04
  4. Step 4: Simplify right side
    987x = 595,252.38
  5. Step 5: Solve for x
    x = 595,252.38/987
  6. Step 6: Final answer
    x = 603.09

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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.