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Finding the Fourth Proportional to 1,147.06, 1,720.92 and 453.83

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Solution

The fourth proportional to 1,147.06, 1,720.92 and 453.83 is: 680.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.06 : 1,720.92 = 453.83 : x
  2. Step 2: Convert to fraction form
    1,147.06/1,720.92 = 453.83/x
  3. Step 3: Cross multiply
    1,147.06x = 1,720.92 × 453.83
  4. Step 4: Simplify right side
    1,147.06x = 781,005.12
  5. Step 5: Solve for x
    x = 781,005.12/1,147.06
  6. Step 6: Final answer
    x = 680.88

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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.