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Finding the Fourth Proportional to 5,260.78, 7,891.17 and 2,953.90

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Solution

The fourth proportional to 5,260.78, 7,891.17 and 2,953.90 is: 4,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,260.78 : 7,891.17 = 2,953.90 : x
  2. Step 2: Convert to fraction form
    5,260.78/7,891.17 = 2,953.90/x
  3. Step 3: Cross multiply
    5,260.78x = 7,891.17 × 2,953.90
  4. Step 4: Simplify right side
    5,260.78x = 23,309,727.06
  5. Step 5: Solve for x
    x = 23,309,727.06/5,260.78
  6. Step 6: Final answer
    x = 4,430.85

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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.