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Finding the Fourth Proportional to 5,308.68, 7,959.78 and 2,187.72

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Solution

The fourth proportional to 5,308.68, 7,959.78 and 2,187.72 is: 3,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.68 : 7,959.78 = 2,187.72 : x
  2. Step 2: Convert to fraction form
    5,308.68/7,959.78 = 2,187.72/x
  3. Step 3: Cross multiply
    5,308.68x = 7,959.78 × 2,187.72
  4. Step 4: Simplify right side
    5,308.68x = 17,413,769.90
  5. Step 5: Solve for x
    x = 17,413,769.90/5,308.68
  6. Step 6: Final answer
    x = 3,280.24

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1.5x scale

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.