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Finding the Fourth Proportional to 961.20, 1,442.76 and 528.56

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Solution

The fourth proportional to 961.20, 1,442.76 and 528.56 is: 793.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.20 : 1,442.76 = 528.56 : x
  2. Step 2: Convert to fraction form
    961.20/1,442.76 = 528.56/x
  3. Step 3: Cross multiply
    961.20x = 1,442.76 × 528.56
  4. Step 4: Simplify right side
    961.20x = 762,585.23
  5. Step 5: Solve for x
    x = 762,585.23/961.20
  6. Step 6: Final answer
    x = 793.37

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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.