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Finding the Fourth Proportional to 1,671.43, 2,507.17 and 438.96

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Solution

The fourth proportional to 1,671.43, 2,507.17 and 438.96 is: 658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.43 : 2,507.17 = 438.96 : x
  2. Step 2: Convert to fraction form
    1,671.43/2,507.17 = 438.96/x
  3. Step 3: Cross multiply
    1,671.43x = 2,507.17 × 438.96
  4. Step 4: Simplify right side
    1,671.43x = 1,100,546.25
  5. Step 5: Solve for x
    x = 1,100,546.25/1,671.43
  6. Step 6: Final answer
    x = 658.45

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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.