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Finding the Fourth Proportional to 765.44, 1,148.80 and 332.88

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Solution

The fourth proportional to 765.44, 1,148.80 and 332.88 is: 499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.44 : 1,148.80 = 332.88 : x
  2. Step 2: Convert to fraction form
    765.44/1,148.80 = 332.88/x
  3. Step 3: Cross multiply
    765.44x = 1,148.80 × 332.88
  4. Step 4: Simplify right side
    765.44x = 382,412.54
  5. Step 5: Solve for x
    x = 382,412.54/765.44
  6. Step 6: Final answer
    x = 499.60

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1.5x scale

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.