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Finding the Fourth Proportional to 5,257.76, 7,879.52 and 2,917.64

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Solution

The fourth proportional to 5,257.76, 7,879.52 and 2,917.64 is: 4,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,257.76 : 7,879.52 = 2,917.64 : x
  2. Step 2: Convert to fraction form
    5,257.76/7,879.52 = 2,917.64/x
  3. Step 3: Cross multiply
    5,257.76x = 7,879.52 × 2,917.64
  4. Step 4: Simplify right side
    5,257.76x = 22,989,602.73
  5. Step 5: Solve for x
    x = 22,989,602.73/5,257.76
  6. Step 6: Final answer
    x = 4,372.51

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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.