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Finding the Fourth Proportional to 964.16, 1,330.98 and 615.32

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Solution

The fourth proportional to 964.16, 1,330.98 and 615.32 is: 849.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.16 : 1,330.98 = 615.32 : x
  2. Step 2: Convert to fraction form
    964.16/1,330.98 = 615.32/x
  3. Step 3: Cross multiply
    964.16x = 1,330.98 × 615.32
  4. Step 4: Simplify right side
    964.16x = 818,978.61
  5. Step 5: Solve for x
    x = 818,978.61/964.16
  6. Step 6: Final answer
    x = 849.42

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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.