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Finding the Fourth Proportional to 1,353.28, 2,029.04 and 659.76

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Solution

The fourth proportional to 1,353.28, 2,029.04 and 659.76 is: 989.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.28 : 2,029.04 = 659.76 : x
  2. Step 2: Convert to fraction form
    1,353.28/2,029.04 = 659.76/x
  3. Step 3: Cross multiply
    1,353.28x = 2,029.04 × 659.76
  4. Step 4: Simplify right side
    1,353.28x = 1,338,679.43
  5. Step 5: Solve for x
    x = 1,338,679.43/1,353.28
  6. Step 6: Final answer
    x = 989.21

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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.