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Finding the Fourth Proportional to 445.14, 614.28 and 248.66

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Solution

The fourth proportional to 445.14, 614.28 and 248.66 is: 343.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.14 : 614.28 = 248.66 : x
  2. Step 2: Convert to fraction form
    445.14/614.28 = 248.66/x
  3. Step 3: Cross multiply
    445.14x = 614.28 × 248.66
  4. Step 4: Simplify right side
    445.14x = 152,743.79
  5. Step 5: Solve for x
    x = 152,743.79/445.14
  6. Step 6: Final answer
    x = 343.14

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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.