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Finding the Fourth Proportional to 963.25, 1,329.29 and 521.15

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Solution

The fourth proportional to 963.25, 1,329.29 and 521.15 is: 719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.25 : 1,329.29 = 521.15 : x
  2. Step 2: Convert to fraction form
    963.25/1,329.29 = 521.15/x
  3. Step 3: Cross multiply
    963.25x = 1,329.29 × 521.15
  4. Step 4: Simplify right side
    963.25x = 692,760.20
  5. Step 5: Solve for x
    x = 692,760.20/963.25
  6. Step 6: Final answer
    x = 719.19

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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.