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Finding the Fourth Proportional to 1,062.16, 1,591.20 and 889.92

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Solution

The fourth proportional to 1,062.16, 1,591.20 and 889.92 is: 1,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.16 : 1,591.20 = 889.92 : x
  2. Step 2: Convert to fraction form
    1,062.16/1,591.20 = 889.92/x
  3. Step 3: Cross multiply
    1,062.16x = 1,591.20 × 889.92
  4. Step 4: Simplify right side
    1,062.16x = 1,416,040.70
  5. Step 5: Solve for x
    x = 1,416,040.70/1,062.16
  6. Step 6: Final answer
    x = 1,333.17

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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.