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Finding the Fourth Proportional to 645.04, 966.12 and 400.87

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Solution

The fourth proportional to 645.04, 966.12 and 400.87 is: 600.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.04 : 966.12 = 400.87 : x
  2. Step 2: Convert to fraction form
    645.04/966.12 = 400.87/x
  3. Step 3: Cross multiply
    645.04x = 966.12 × 400.87
  4. Step 4: Simplify right side
    645.04x = 387,288.52
  5. Step 5: Solve for x
    x = 387,288.52/645.04
  6. Step 6: Final answer
    x = 600.41

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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.