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Finding the Fourth Proportional to 2,979.59, 4,469.03 and 788.49

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Solution

The fourth proportional to 2,979.59, 4,469.03 and 788.49 is: 1,182.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.59 : 4,469.03 = 788.49 : x
  2. Step 2: Convert to fraction form
    2,979.59/4,469.03 = 788.49/x
  3. Step 3: Cross multiply
    2,979.59x = 4,469.03 × 788.49
  4. Step 4: Simplify right side
    2,979.59x = 3,523,763.12
  5. Step 5: Solve for x
    x = 3,523,763.12/2,979.59
  6. Step 6: Final answer
    x = 1,182.64

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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.