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Finding the Fourth Proportional to 1,147.45, 1,721.19 and 453.82

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Solution

The fourth proportional to 1,147.45, 1,721.19 and 453.82 is: 680.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.45 : 1,721.19 = 453.82 : x
  2. Step 2: Convert to fraction form
    1,147.45/1,721.19 = 453.82/x
  3. Step 3: Cross multiply
    1,147.45x = 1,721.19 × 453.82
  4. Step 4: Simplify right side
    1,147.45x = 781,110.45
  5. Step 5: Solve for x
    x = 781,110.45/1,147.45
  6. Step 6: Final answer
    x = 680.74

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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.