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Finding the Fourth Proportional to 2,800.16, 4,199.92 and 748.32

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Solution

The fourth proportional to 2,800.16, 4,199.92 and 748.32 is: 1,122.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.16 : 4,199.92 = 748.32 : x
  2. Step 2: Convert to fraction form
    2,800.16/4,199.92 = 748.32/x
  3. Step 3: Cross multiply
    2,800.16x = 4,199.92 × 748.32
  4. Step 4: Simplify right side
    2,800.16x = 3,142,884.13
  5. Step 5: Solve for x
    x = 3,142,884.13/2,800.16
  6. Step 6: Final answer
    x = 1,122.39

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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.