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Finding the Fourth Proportional to 1,079.15, 1,616.54 and 662.15

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Solution

The fourth proportional to 1,079.15, 1,616.54 and 662.15 is: 991.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.15 : 1,616.54 = 662.15 : x
  2. Step 2: Convert to fraction form
    1,079.15/1,616.54 = 662.15/x
  3. Step 3: Cross multiply
    1,079.15x = 1,616.54 × 662.15
  4. Step 4: Simplify right side
    1,079.15x = 1,070,391.60
  5. Step 5: Solve for x
    x = 1,070,391.60/1,079.15
  6. Step 6: Final answer
    x = 991.89

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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.