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Finding the Fourth Proportional to 1,104.80, 1,656.60 and 411.44

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Solution

The fourth proportional to 1,104.80, 1,656.60 and 411.44 is: 616.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.80 : 1,656.60 = 411.44 : x
  2. Step 2: Convert to fraction form
    1,104.80/1,656.60 = 411.44/x
  3. Step 3: Cross multiply
    1,104.80x = 1,656.60 × 411.44
  4. Step 4: Simplify right side
    1,104.80x = 681,591.50
  5. Step 5: Solve for x
    x = 681,591.50/1,104.80
  6. Step 6: Final answer
    x = 616.94

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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.