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Finding the Fourth Proportional to 402.84, 604.49 and 171.70

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Solution

The fourth proportional to 402.84, 604.49 and 171.70 is: 257.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.84 : 604.49 = 171.70 : x
  2. Step 2: Convert to fraction form
    402.84/604.49 = 171.70/x
  3. Step 3: Cross multiply
    402.84x = 604.49 × 171.70
  4. Step 4: Simplify right side
    402.84x = 103,790.93
  5. Step 5: Solve for x
    x = 103,790.93/402.84
  6. Step 6: Final answer
    x = 257.65

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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.