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Finding the Fourth Proportional to 325.80, 487.90 and 244.20

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Solution

The fourth proportional to 325.80, 487.90 and 244.20 is: 365.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.80 : 487.90 = 244.20 : x
  2. Step 2: Convert to fraction form
    325.80/487.90 = 244.20/x
  3. Step 3: Cross multiply
    325.80x = 487.90 × 244.20
  4. Step 4: Simplify right side
    325.80x = 119,145.18
  5. Step 5: Solve for x
    x = 119,145.18/325.80
  6. Step 6: Final answer
    x = 365.70

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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.