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Finding the Fourth Proportional to 457.59, 686.35 and 169

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Solution

The fourth proportional to 457.59, 686.35 and 169 is: 253.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.59 : 686.35 = 169 : x
  2. Step 2: Convert to fraction form
    457.59/686.35 = 169/x
  3. Step 3: Cross multiply
    457.59x = 686.35 × 169
  4. Step 4: Simplify right side
    457.59x = 115,993.15
  5. Step 5: Solve for x
    x = 115,993.15/457.59
  6. Step 6: Final answer
    x = 253.49

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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.