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Finding the Fourth Proportional to 964.49, 1,331.61 and 743.03

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Solution

The fourth proportional to 964.49, 1,331.61 and 743.03 is: 1,025.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.49 : 1,331.61 = 743.03 : x
  2. Step 2: Convert to fraction form
    964.49/1,331.61 = 743.03/x
  3. Step 3: Cross multiply
    964.49x = 1,331.61 × 743.03
  4. Step 4: Simplify right side
    964.49x = 989,426.18
  5. Step 5: Solve for x
    x = 989,426.18/964.49
  6. Step 6: Final answer
    x = 1,025.85

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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.