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Finding the Fourth Proportional to 951.88, 1,314.42 and 920.88

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Solution

The fourth proportional to 951.88, 1,314.42 and 920.88 is: 1,271.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.88 : 1,314.42 = 920.88 : x
  2. Step 2: Convert to fraction form
    951.88/1,314.42 = 920.88/x
  3. Step 3: Cross multiply
    951.88x = 1,314.42 × 920.88
  4. Step 4: Simplify right side
    951.88x = 1,210,423.09
  5. Step 5: Solve for x
    x = 1,210,423.09/951.88
  6. Step 6: Final answer
    x = 1,271.61

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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.