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Finding the Fourth Proportional to 963.65, 1,329.83 and 521.55

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Solution

The fourth proportional to 963.65, 1,329.83 and 521.55 is: 719.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.65 : 1,329.83 = 521.55 : x
  2. Step 2: Convert to fraction form
    963.65/1,329.83 = 521.55/x
  3. Step 3: Cross multiply
    963.65x = 1,329.83 × 521.55
  4. Step 4: Simplify right side
    963.65x = 693,568.48
  5. Step 5: Solve for x
    x = 693,568.48/963.65
  6. Step 6: Final answer
    x = 719.73

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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.