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Finding the Fourth Proportional to 1,104.12, 1,656.60 and 488.40

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Solution

The fourth proportional to 1,104.12, 1,656.60 and 488.40 is: 732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.12 : 1,656.60 = 488.40 : x
  2. Step 2: Convert to fraction form
    1,104.12/1,656.60 = 488.40/x
  3. Step 3: Cross multiply
    1,104.12x = 1,656.60 × 488.40
  4. Step 4: Simplify right side
    1,104.12x = 809,083.44
  5. Step 5: Solve for x
    x = 809,083.44/1,104.12
  6. Step 6: Final answer
    x = 732.79

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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.