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Finding the Fourth Proportional to 1,604.88, 2,405.46 and 728.04

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Solution

The fourth proportional to 1,604.88, 2,405.46 and 728.04 is: 1,091.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.88 : 2,405.46 = 728.04 : x
  2. Step 2: Convert to fraction form
    1,604.88/2,405.46 = 728.04/x
  3. Step 3: Cross multiply
    1,604.88x = 2,405.46 × 728.04
  4. Step 4: Simplify right side
    1,604.88x = 1,751,271.10
  5. Step 5: Solve for x
    x = 1,751,271.10/1,604.88
  6. Step 6: Final answer
    x = 1,091.22

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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.