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Finding the Fourth Proportional to 318.85, 440.02 and 248.99

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Solution

The fourth proportional to 318.85, 440.02 and 248.99 is: 343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.85 : 440.02 = 248.99 : x
  2. Step 2: Convert to fraction form
    318.85/440.02 = 248.99/x
  3. Step 3: Cross multiply
    318.85x = 440.02 × 248.99
  4. Step 4: Simplify right side
    318.85x = 109,557.76
  5. Step 5: Solve for x
    x = 109,557.76/318.85
  6. Step 6: Final answer
    x = 343.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.