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Finding the Fourth Proportional to 445.40, 614.64 and 248.91

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Solution

The fourth proportional to 445.40, 614.64 and 248.91 is: 343.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.40 : 614.64 = 248.91 : x
  2. Step 2: Convert to fraction form
    445.40/614.64 = 248.91/x
  3. Step 3: Cross multiply
    445.40x = 614.64 × 248.91
  4. Step 4: Simplify right side
    445.40x = 152,987.27
  5. Step 5: Solve for x
    x = 152,987.27/445.40
  6. Step 6: Final answer
    x = 343.48

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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.