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Finding the Fourth Proportional to 959.59, 1,324.56 and 665.25

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Solution

The fourth proportional to 959.59, 1,324.56 and 665.25 is: 918.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.59 : 1,324.56 = 665.25 : x
  2. Step 2: Convert to fraction form
    959.59/1,324.56 = 665.25/x
  3. Step 3: Cross multiply
    959.59x = 1,324.56 × 665.25
  4. Step 4: Simplify right side
    959.59x = 881,163.54
  5. Step 5: Solve for x
    x = 881,163.54/959.59
  6. Step 6: Final answer
    x = 918.27

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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.