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Finding the Fourth Proportional to 172.59, 257.55 and 154.11

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Solution

The fourth proportional to 172.59, 257.55 and 154.11 is: 229.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.59 : 257.55 = 154.11 : x
  2. Step 2: Convert to fraction form
    172.59/257.55 = 154.11/x
  3. Step 3: Cross multiply
    172.59x = 257.55 × 154.11
  4. Step 4: Simplify right side
    172.59x = 39,691.03
  5. Step 5: Solve for x
    x = 39,691.03/172.59
  6. Step 6: Final answer
    x = 229.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.