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Finding the Fourth Proportional to 445.45, 614.78 and 249.01

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Solution

The fourth proportional to 445.45, 614.78 and 249.01 is: 343.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.45 : 614.78 = 249.01 : x
  2. Step 2: Convert to fraction form
    445.45/614.78 = 249.01/x
  3. Step 3: Cross multiply
    445.45x = 614.78 × 249.01
  4. Step 4: Simplify right side
    445.45x = 153,083.92
  5. Step 5: Solve for x
    x = 153,083.92/445.45
  6. Step 6: Final answer
    x = 343.66

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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.