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Finding the Fourth Proportional to 218.35, 301.28 and 148.47

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Solution

The fourth proportional to 218.35, 301.28 and 148.47 is: 204.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.35 : 301.28 = 148.47 : x
  2. Step 2: Convert to fraction form
    218.35/301.28 = 148.47/x
  3. Step 3: Cross multiply
    218.35x = 301.28 × 148.47
  4. Step 4: Simplify right side
    218.35x = 44,731.04
  5. Step 5: Solve for x
    x = 44,731.04/218.35
  6. Step 6: Final answer
    x = 204.86

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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.