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Finding the Fourth Proportional to 959.54, 1,324.41 and 679.82

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Solution

The fourth proportional to 959.54, 1,324.41 and 679.82 is: 938.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.54 : 1,324.41 = 679.82 : x
  2. Step 2: Convert to fraction form
    959.54/1,324.41 = 679.82/x
  3. Step 3: Cross multiply
    959.54x = 1,324.41 × 679.82
  4. Step 4: Simplify right side
    959.54x = 900,363.72
  5. Step 5: Solve for x
    x = 900,363.72/959.54
  6. Step 6: Final answer
    x = 938.33

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1.5x scale

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.