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Finding the Fourth Proportional to 325.79, 488.76 and 171.79

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Solution

The fourth proportional to 325.79, 488.76 and 171.79 is: 257.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.79 : 488.76 = 171.79 : x
  2. Step 2: Convert to fraction form
    325.79/488.76 = 171.79/x
  3. Step 3: Cross multiply
    325.79x = 488.76 × 171.79
  4. Step 4: Simplify right side
    325.79x = 83,960.78
  5. Step 5: Solve for x
    x = 83,960.78/325.79
  6. Step 6: Final answer
    x = 257.72

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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.