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Finding the Fourth Proportional to 963.79, 1,329.56 and 632.07

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Solution

The fourth proportional to 963.79, 1,329.56 and 632.07 is: 871.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.79 : 1,329.56 = 632.07 : x
  2. Step 2: Convert to fraction form
    963.79/1,329.56 = 632.07/x
  3. Step 3: Cross multiply
    963.79x = 1,329.56 × 632.07
  4. Step 4: Simplify right side
    963.79x = 840,374.99
  5. Step 5: Solve for x
    x = 840,374.99/963.79
  6. Step 6: Final answer
    x = 871.95

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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.