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Finding the Fourth Proportional to 175.15, 262.35 and 140.72

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Solution

The fourth proportional to 175.15, 262.35 and 140.72 is: 210.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.15 : 262.35 = 140.72 : x
  2. Step 2: Convert to fraction form
    175.15/262.35 = 140.72/x
  3. Step 3: Cross multiply
    175.15x = 262.35 × 140.72
  4. Step 4: Simplify right side
    175.15x = 36,917.89
  5. Step 5: Solve for x
    x = 36,917.89/175.15
  6. Step 6: Final answer
    x = 210.78

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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.