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Finding the Fourth Proportional to 240.16, 358.48 and 218.56

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Solution

The fourth proportional to 240.16, 358.48 and 218.56 is: 326.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.16 : 358.48 = 218.56 : x
  2. Step 2: Convert to fraction form
    240.16/358.48 = 218.56/x
  3. Step 3: Cross multiply
    240.16x = 358.48 × 218.56
  4. Step 4: Simplify right side
    240.16x = 78,349.39
  5. Step 5: Solve for x
    x = 78,349.39/240.16
  6. Step 6: Final answer
    x = 326.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.