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Finding the Fourth Proportional to 963.28, 1,327.08 and 787.60

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Solution

The fourth proportional to 963.28, 1,327.08 and 787.60 is: 1,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.28 : 1,327.08 = 787.60 : x
  2. Step 2: Convert to fraction form
    963.28/1,327.08 = 787.60/x
  3. Step 3: Cross multiply
    963.28x = 1,327.08 × 787.60
  4. Step 4: Simplify right side
    963.28x = 1,045,208.21
  5. Step 5: Solve for x
    x = 1,045,208.21/963.28
  6. Step 6: Final answer
    x = 1,085.05

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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.