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Finding the Fourth Proportional to 951.09, 1,311.97 and 558.03

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Solution

The fourth proportional to 951.09, 1,311.97 and 558.03 is: 769.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.09 : 1,311.97 = 558.03 : x
  2. Step 2: Convert to fraction form
    951.09/1,311.97 = 558.03/x
  3. Step 3: Cross multiply
    951.09x = 1,311.97 × 558.03
  4. Step 4: Simplify right side
    951.09x = 732,118.62
  5. Step 5: Solve for x
    x = 732,118.62/951.09
  6. Step 6: Final answer
    x = 769.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.