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Finding the Fourth Proportional to 750.20, 1,125.30 and 230.28

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Solution

The fourth proportional to 750.20, 1,125.30 and 230.28 is: 345.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.20 : 1,125.30 = 230.28 : x
  2. Step 2: Convert to fraction form
    750.20/1,125.30 = 230.28/x
  3. Step 3: Cross multiply
    750.20x = 1,125.30 × 230.28
  4. Step 4: Simplify right side
    750.20x = 259,134.08
  5. Step 5: Solve for x
    x = 259,134.08/750.20
  6. Step 6: Final answer
    x = 345.42

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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.