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Finding the Fourth Proportional to 951.13, 1,421.45 and 877.24

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Solution

The fourth proportional to 951.13, 1,421.45 and 877.24 is: 1,311.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.13 : 1,421.45 = 877.24 : x
  2. Step 2: Convert to fraction form
    951.13/1,421.45 = 877.24/x
  3. Step 3: Cross multiply
    951.13x = 1,421.45 × 877.24
  4. Step 4: Simplify right side
    951.13x = 1,246,952.80
  5. Step 5: Solve for x
    x = 1,246,952.80/951.13
  6. Step 6: Final answer
    x = 1,311.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.