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Finding the Fourth Proportional to 959.95, 1,322.31 and 679.69

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Solution

The fourth proportional to 959.95, 1,322.31 and 679.69 is: 936.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.95 : 1,322.31 = 679.69 : x
  2. Step 2: Convert to fraction form
    959.95/1,322.31 = 679.69/x
  3. Step 3: Cross multiply
    959.95x = 1,322.31 × 679.69
  4. Step 4: Simplify right side
    959.95x = 898,760.88
  5. Step 5: Solve for x
    x = 898,760.88/959.95
  6. Step 6: Final answer
    x = 936.26

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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.