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Finding the Fourth Proportional to 766.32, 1,148.80 and 333.24

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Solution

The fourth proportional to 766.32, 1,148.80 and 333.24 is: 499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.32 : 1,148.80 = 333.24 : x
  2. Step 2: Convert to fraction form
    766.32/1,148.80 = 333.24/x
  3. Step 3: Cross multiply
    766.32x = 1,148.80 × 333.24
  4. Step 4: Simplify right side
    766.32x = 382,826.11
  5. Step 5: Solve for x
    x = 382,826.11/766.32
  6. Step 6: Final answer
    x = 499.56

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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.