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Finding the Fourth Proportional to 964.50, 1,331.86 and 611.04

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Solution

The fourth proportional to 964.50, 1,331.86 and 611.04 is: 843.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.50 : 1,331.86 = 611.04 : x
  2. Step 2: Convert to fraction form
    964.50/1,331.86 = 611.04/x
  3. Step 3: Cross multiply
    964.50x = 1,331.86 × 611.04
  4. Step 4: Simplify right side
    964.50x = 813,819.73
  5. Step 5: Solve for x
    x = 813,819.73/964.50
  6. Step 6: Final answer
    x = 843.77

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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.