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Finding the Fourth Proportional to 1,147.23, 1,720.82 and 281.55

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Solution

The fourth proportional to 1,147.23, 1,720.82 and 281.55 is: 422.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.23 : 1,720.82 = 281.55 : x
  2. Step 2: Convert to fraction form
    1,147.23/1,720.82 = 281.55/x
  3. Step 3: Cross multiply
    1,147.23x = 1,720.82 × 281.55
  4. Step 4: Simplify right side
    1,147.23x = 484,495.46
  5. Step 5: Solve for x
    x = 484,495.46/1,147.23
  6. Step 6: Final answer
    x = 422.32

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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.