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Finding the Fourth Proportional to 232.01, 347.90 and 85.65

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Solution

The fourth proportional to 232.01, 347.90 and 85.65 is: 128.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.01 : 347.90 = 85.65 : x
  2. Step 2: Convert to fraction form
    232.01/347.90 = 85.65/x
  3. Step 3: Cross multiply
    232.01x = 347.90 × 85.65
  4. Step 4: Simplify right side
    232.01x = 29,798.83
  5. Step 5: Solve for x
    x = 29,798.83/232.01
  6. Step 6: Final answer
    x = 128.44

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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.