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Finding the Fourth Proportional to 233.54, 350.12 and 87.20

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Solution

The fourth proportional to 233.54, 350.12 and 87.20 is: 130.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.54 : 350.12 = 87.20 : x
  2. Step 2: Convert to fraction form
    233.54/350.12 = 87.20/x
  3. Step 3: Cross multiply
    233.54x = 350.12 × 87.20
  4. Step 4: Simplify right side
    233.54x = 30,530.03
  5. Step 5: Solve for x
    x = 30,530.03/233.54
  6. Step 6: Final answer
    x = 130.73

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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.