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Finding the Fourth Proportional to 1,542.82, 2,314.22 and 721.48

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Solution

The fourth proportional to 1,542.82, 2,314.22 and 721.48 is: 1,082.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.82 : 2,314.22 = 721.48 : x
  2. Step 2: Convert to fraction form
    1,542.82/2,314.22 = 721.48/x
  3. Step 3: Cross multiply
    1,542.82x = 2,314.22 × 721.48
  4. Step 4: Simplify right side
    1,542.82x = 1,669,663.45
  5. Step 5: Solve for x
    x = 1,669,663.45/1,542.82
  6. Step 6: Final answer
    x = 1,082.22

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1.5x scale

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.