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Finding the Fourth Proportional to 959.58, 1,324.38 and 561.18

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Solution

The fourth proportional to 959.58, 1,324.38 and 561.18 is: 774.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.58 : 1,324.38 = 561.18 : x
  2. Step 2: Convert to fraction form
    959.58/1,324.38 = 561.18/x
  3. Step 3: Cross multiply
    959.58x = 1,324.38 × 561.18
  4. Step 4: Simplify right side
    959.58x = 743,215.57
  5. Step 5: Solve for x
    x = 743,215.57/959.58
  6. Step 6: Final answer
    x = 774.52

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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.