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Finding the Fourth Proportional to 457.10, 685.50 and 148.87

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Solution

The fourth proportional to 457.10, 685.50 and 148.87 is: 223.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.10 : 685.50 = 148.87 : x
  2. Step 2: Convert to fraction form
    457.10/685.50 = 148.87/x
  3. Step 3: Cross multiply
    457.10x = 685.50 × 148.87
  4. Step 4: Simplify right side
    457.10x = 102,052.66
  5. Step 5: Solve for x
    x = 102,052.66/457.10
  6. Step 6: Final answer
    x = 223.26

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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.