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Finding the Fourth Proportional to 951.40, 1,318.99 and 908.20

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Solution

The fourth proportional to 951.40, 1,318.99 and 908.20 is: 1,259.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.40 : 1,318.99 = 908.20 : x
  2. Step 2: Convert to fraction form
    951.40/1,318.99 = 908.20/x
  3. Step 3: Cross multiply
    951.40x = 1,318.99 × 908.20
  4. Step 4: Simplify right side
    951.40x = 1,197,906.72
  5. Step 5: Solve for x
    x = 1,197,906.72/951.40
  6. Step 6: Final answer
    x = 1,259.10

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.