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Finding the Fourth Proportional to 964.56, 1,331.50 and 615.45

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Solution

The fourth proportional to 964.56, 1,331.50 and 615.45 is: 849.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.56 : 1,331.50 = 615.45 : x
  2. Step 2: Convert to fraction form
    964.56/1,331.50 = 615.45/x
  3. Step 3: Cross multiply
    964.56x = 1,331.50 × 615.45
  4. Step 4: Simplify right side
    964.56x = 819,471.68
  5. Step 5: Solve for x
    x = 819,471.68/964.56
  6. Step 6: Final answer
    x = 849.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.