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Finding the Fourth Proportional to 1,168.12, 1,752.54 and 682.12

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Solution

The fourth proportional to 1,168.12, 1,752.54 and 682.12 is: 1,023.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.12 : 1,752.54 = 682.12 : x
  2. Step 2: Convert to fraction form
    1,168.12/1,752.54 = 682.12/x
  3. Step 3: Cross multiply
    1,168.12x = 1,752.54 × 682.12
  4. Step 4: Simplify right side
    1,168.12x = 1,195,442.58
  5. Step 5: Solve for x
    x = 1,195,442.58/1,168.12
  6. Step 6: Final answer
    x = 1,023.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.