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Finding the Fourth Proportional to 964.29, 1,329.98 and 699.73

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Solution

The fourth proportional to 964.29, 1,329.98 and 699.73 is: 965.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.29 : 1,329.98 = 699.73 : x
  2. Step 2: Convert to fraction form
    964.29/1,329.98 = 699.73/x
  3. Step 3: Cross multiply
    964.29x = 1,329.98 × 699.73
  4. Step 4: Simplify right side
    964.29x = 930,626.91
  5. Step 5: Solve for x
    x = 930,626.91/964.29
  6. Step 6: Final answer
    x = 965.09

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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.