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Finding the Fourth Proportional to 1,358.62, 2,037.93 and 481.21

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Solution

The fourth proportional to 1,358.62, 2,037.93 and 481.21 is: 721.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.62 : 2,037.93 = 481.21 : x
  2. Step 2: Convert to fraction form
    1,358.62/2,037.93 = 481.21/x
  3. Step 3: Cross multiply
    1,358.62x = 2,037.93 × 481.21
  4. Step 4: Simplify right side
    1,358.62x = 980,672.30
  5. Step 5: Solve for x
    x = 980,672.30/1,358.62
  6. Step 6: Final answer
    x = 721.82

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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.