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Finding the Fourth Proportional to 1,201.19, 1,657.61 and 677.22

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Solution

The fourth proportional to 1,201.19, 1,657.61 and 677.22 is: 934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.19 : 1,657.61 = 677.22 : x
  2. Step 2: Convert to fraction form
    1,201.19/1,657.61 = 677.22/x
  3. Step 3: Cross multiply
    1,201.19x = 1,657.61 × 677.22
  4. Step 4: Simplify right side
    1,201.19x = 1,122,566.64
  5. Step 5: Solve for x
    x = 1,122,566.64/1,201.19
  6. Step 6: Final answer
    x = 934.55

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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.