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Finding the Fourth Proportional to 963.29, 1,328.60 and 698.73

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Solution

The fourth proportional to 963.29, 1,328.60 and 698.73 is: 963.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.29 : 1,328.60 = 698.73 : x
  2. Step 2: Convert to fraction form
    963.29/1,328.60 = 698.73/x
  3. Step 3: Cross multiply
    963.29x = 1,328.60 × 698.73
  4. Step 4: Simplify right side
    963.29x = 928,329.44
  5. Step 5: Solve for x
    x = 928,329.44/963.29
  6. Step 6: Final answer
    x = 963.70

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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.