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Finding the Fourth Proportional to 325.57, 488.34 and 82.10

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Solution

The fourth proportional to 325.57, 488.34 and 82.10 is: 123.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.57 : 488.34 = 82.10 : x
  2. Step 2: Convert to fraction form
    325.57/488.34 = 82.10/x
  3. Step 3: Cross multiply
    325.57x = 488.34 × 82.10
  4. Step 4: Simplify right side
    325.57x = 40,092.71
  5. Step 5: Solve for x
    x = 40,092.71/325.57
  6. Step 6: Final answer
    x = 123.15

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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.