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Finding the Fourth Proportional to 944.13, 1,423.20 and 862.11

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Solution

The fourth proportional to 944.13, 1,423.20 and 862.11 is: 1,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.13 : 1,423.20 = 862.11 : x
  2. Step 2: Convert to fraction form
    944.13/1,423.20 = 862.11/x
  3. Step 3: Cross multiply
    944.13x = 1,423.20 × 862.11
  4. Step 4: Simplify right side
    944.13x = 1,226,954.95
  5. Step 5: Solve for x
    x = 1,226,954.95/944.13
  6. Step 6: Final answer
    x = 1,299.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.