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Finding the Fourth Proportional to 1,425.44, 2,138 and 1,060.80

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Solution

The fourth proportional to 1,425.44, 2,138 and 1,060.80 is: 1,591.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.44 : 2,138 = 1,060.80 : x
  2. Step 2: Convert to fraction form
    1,425.44/2,138 = 1,060.80/x
  3. Step 3: Cross multiply
    1,425.44x = 2,138 × 1,060.80
  4. Step 4: Simplify right side
    1,425.44x = 2,267,990.40
  5. Step 5: Solve for x
    x = 2,267,990.40/1,425.44
  6. Step 6: Final answer
    x = 1,591.08

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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.