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Finding the Fourth Proportional to 964.38, 1,329.45 and 632.23

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Solution

The fourth proportional to 964.38, 1,329.45 and 632.23 is: 871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.38 : 1,329.45 = 632.23 : x
  2. Step 2: Convert to fraction form
    964.38/1,329.45 = 632.23/x
  3. Step 3: Cross multiply
    964.38x = 1,329.45 × 632.23
  4. Step 4: Simplify right side
    964.38x = 840,512.48
  5. Step 5: Solve for x
    x = 840,512.48/964.38
  6. Step 6: Final answer
    x = 871.56

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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.