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Finding the Fourth Proportional to 456.70, 685.17 and 148.66

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Solution

The fourth proportional to 456.70, 685.17 and 148.66 is: 223.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.70 : 685.17 = 148.66 : x
  2. Step 2: Convert to fraction form
    456.70/685.17 = 148.66/x
  3. Step 3: Cross multiply
    456.70x = 685.17 × 148.66
  4. Step 4: Simplify right side
    456.70x = 101,857.37
  5. Step 5: Solve for x
    x = 101,857.37/456.70
  6. Step 6: Final answer
    x = 223.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.