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Finding the Fourth Proportional to 802, 1,200.96 and 728.04

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Solution

The fourth proportional to 802, 1,200.96 and 728.04 is: 1,090.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    802 : 1,200.96 = 728.04 : x
  2. Step 2: Convert to fraction form
    802/1,200.96 = 728.04/x
  3. Step 3: Cross multiply
    802x = 1,200.96 × 728.04
  4. Step 4: Simplify right side
    802x = 874,346.92
  5. Step 5: Solve for x
    x = 874,346.92/802
  6. Step 6: Final answer
    x = 1,090.21

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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.