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Finding the Fourth Proportional to 1,428.86, 1,972.44 and 963.38

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Solution

The fourth proportional to 1,428.86, 1,972.44 and 963.38 is: 1,329.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.86 : 1,972.44 = 963.38 : x
  2. Step 2: Convert to fraction form
    1,428.86/1,972.44 = 963.38/x
  3. Step 3: Cross multiply
    1,428.86x = 1,972.44 × 963.38
  4. Step 4: Simplify right side
    1,428.86x = 1,900,209.25
  5. Step 5: Solve for x
    x = 1,900,209.25/1,428.86
  6. Step 6: Final answer
    x = 1,329.88

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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.