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Finding the Fourth Proportional to 1,201.11, 1,657.53 and 677.15

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Solution

The fourth proportional to 1,201.11, 1,657.53 and 677.15 is: 934.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.11 : 1,657.53 = 677.15 : x
  2. Step 2: Convert to fraction form
    1,201.11/1,657.53 = 677.15/x
  3. Step 3: Cross multiply
    1,201.11x = 1,657.53 × 677.15
  4. Step 4: Simplify right side
    1,201.11x = 1,122,396.44
  5. Step 5: Solve for x
    x = 1,122,396.44/1,201.11
  6. Step 6: Final answer
    x = 934.47

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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.