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Finding the Fourth Proportional to 2,789.80, 4,184.70 and 1,253.80

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Solution

The fourth proportional to 2,789.80, 4,184.70 and 1,253.80 is: 1,880.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.80 : 4,184.70 = 1,253.80 : x
  2. Step 2: Convert to fraction form
    2,789.80/4,184.70 = 1,253.80/x
  3. Step 3: Cross multiply
    2,789.80x = 4,184.70 × 1,253.80
  4. Step 4: Simplify right side
    2,789.80x = 5,246,776.86
  5. Step 5: Solve for x
    x = 5,246,776.86/2,789.80
  6. Step 6: Final answer
    x = 1,880.70

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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.