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Finding the Fourth Proportional to 963.28, 1,329.32 and 521.18

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Solution

The fourth proportional to 963.28, 1,329.32 and 521.18 is: 719.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.28 : 1,329.32 = 521.18 : x
  2. Step 2: Convert to fraction form
    963.28/1,329.32 = 521.18/x
  3. Step 3: Cross multiply
    963.28x = 1,329.32 × 521.18
  4. Step 4: Simplify right side
    963.28x = 692,805.75
  5. Step 5: Solve for x
    x = 692,805.75/963.28
  6. Step 6: Final answer
    x = 719.22

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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.