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Finding the Fourth Proportional to 2,979.03, 4,468.10 and 1,129.20

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Solution

The fourth proportional to 2,979.03, 4,468.10 and 1,129.20 is: 1,693.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.03 : 4,468.10 = 1,129.20 : x
  2. Step 2: Convert to fraction form
    2,979.03/4,468.10 = 1,129.20/x
  3. Step 3: Cross multiply
    2,979.03x = 4,468.10 × 1,129.20
  4. Step 4: Simplify right side
    2,979.03x = 5,045,372.87
  5. Step 5: Solve for x
    x = 5,045,372.87/2,979.03
  6. Step 6: Final answer
    x = 1,693.63

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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.