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Finding the Fourth Proportional to 245.75, 339.35 and 172.11

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Solution

The fourth proportional to 245.75, 339.35 and 172.11 is: 237.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.75 : 339.35 = 172.11 : x
  2. Step 2: Convert to fraction form
    245.75/339.35 = 172.11/x
  3. Step 3: Cross multiply
    245.75x = 339.35 × 172.11
  4. Step 4: Simplify right side
    245.75x = 58,404.67
  5. Step 5: Solve for x
    x = 58,404.67/245.75
  6. Step 6: Final answer
    x = 237.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.