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Finding the Fourth Proportional to 955.68, 1,432.80 and 516.48

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Solution

The fourth proportional to 955.68, 1,432.80 and 516.48 is: 774.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.68 : 1,432.80 = 516.48 : x
  2. Step 2: Convert to fraction form
    955.68/1,432.80 = 516.48/x
  3. Step 3: Cross multiply
    955.68x = 1,432.80 × 516.48
  4. Step 4: Simplify right side
    955.68x = 740,012.54
  5. Step 5: Solve for x
    x = 740,012.54/955.68
  6. Step 6: Final answer
    x = 774.33

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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.