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Finding the Fourth Proportional to 951.40, 1,428.70 and 922.60

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Solution

The fourth proportional to 951.40, 1,428.70 and 922.60 is: 1,385.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.40 : 1,428.70 = 922.60 : x
  2. Step 2: Convert to fraction form
    951.40/1,428.70 = 922.60/x
  3. Step 3: Cross multiply
    951.40x = 1,428.70 × 922.60
  4. Step 4: Simplify right side
    951.40x = 1,318,118.62
  5. Step 5: Solve for x
    x = 1,318,118.62/951.40
  6. Step 6: Final answer
    x = 1,385.45

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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.