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Finding the Fourth Proportional to 2,789.70, 4,176.45 and 2,708.70

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Solution

The fourth proportional to 2,789.70, 4,176.45 and 2,708.70 is: 4,055.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.70 : 4,176.45 = 2,708.70 : x
  2. Step 2: Convert to fraction form
    2,789.70/4,176.45 = 2,708.70/x
  3. Step 3: Cross multiply
    2,789.70x = 4,176.45 × 2,708.70
  4. Step 4: Simplify right side
    2,789.70x = 11,312,750.12
  5. Step 5: Solve for x
    x = 11,312,750.12/2,789.70
  6. Step 6: Final answer
    x = 4,055.19

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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.