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Finding the Fourth Proportional to 963.76, 1,323.77 and 945.31

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Solution

The fourth proportional to 963.76, 1,323.77 and 945.31 is: 1,298.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.76 : 1,323.77 = 945.31 : x
  2. Step 2: Convert to fraction form
    963.76/1,323.77 = 945.31/x
  3. Step 3: Cross multiply
    963.76x = 1,323.77 × 945.31
  4. Step 4: Simplify right side
    963.76x = 1,251,373.02
  5. Step 5: Solve for x
    x = 1,251,373.02/963.76
  6. Step 6: Final answer
    x = 1,298.43

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.