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Finding the Fourth Proportional to 457.51, 686.19 and 149.32

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Solution

The fourth proportional to 457.51, 686.19 and 149.32 is: 223.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.51 : 686.19 = 149.32 : x
  2. Step 2: Convert to fraction form
    457.51/686.19 = 149.32/x
  3. Step 3: Cross multiply
    457.51x = 686.19 × 149.32
  4. Step 4: Simplify right side
    457.51x = 102,461.89
  5. Step 5: Solve for x
    x = 102,461.89/457.51
  6. Step 6: Final answer
    x = 223.96

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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.