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Finding the Fourth Proportional to 963.31, 1,328.66 and 614.11

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Solution

The fourth proportional to 963.31, 1,328.66 and 614.11 is: 847.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.31 : 1,328.66 = 614.11 : x
  2. Step 2: Convert to fraction form
    963.31/1,328.66 = 614.11/x
  3. Step 3: Cross multiply
    963.31x = 1,328.66 × 614.11
  4. Step 4: Simplify right side
    963.31x = 815,940.32
  5. Step 5: Solve for x
    x = 815,940.32/963.31
  6. Step 6: Final answer
    x = 847.02

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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.