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Finding the Fourth Proportional to 1,671.82, 2,507.81 and 439.23

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Solution

The fourth proportional to 1,671.82, 2,507.81 and 439.23 is: 658.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.82 : 2,507.81 = 439.23 : x
  2. Step 2: Convert to fraction form
    1,671.82/2,507.81 = 439.23/x
  3. Step 3: Cross multiply
    1,671.82x = 2,507.81 × 439.23
  4. Step 4: Simplify right side
    1,671.82x = 1,101,505.39
  5. Step 5: Solve for x
    x = 1,101,505.39/1,671.82
  6. Step 6: Final answer
    x = 658.87

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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.