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Finding the Fourth Proportional to 5,288.64, 7,305.48 and 3,947.28

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Solution

The fourth proportional to 5,288.64, 7,305.48 and 3,947.28 is: 5,452.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,288.64 : 7,305.48 = 3,947.28 : x
  2. Step 2: Convert to fraction form
    5,288.64/7,305.48 = 3,947.28/x
  3. Step 3: Cross multiply
    5,288.64x = 7,305.48 × 3,947.28
  4. Step 4: Simplify right side
    5,288.64x = 28,836,775.09
  5. Step 5: Solve for x
    x = 28,836,775.09/5,288.64
  6. Step 6: Final answer
    x = 5,452.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.