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Finding the Fourth Proportional to 5,640.72, 7,788.30 and 4,527.78

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Solution

The fourth proportional to 5,640.72, 7,788.30 and 4,527.78 is: 6,251.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.72 : 7,788.30 = 4,527.78 : x
  2. Step 2: Convert to fraction form
    5,640.72/7,788.30 = 4,527.78/x
  3. Step 3: Cross multiply
    5,640.72x = 7,788.30 × 4,527.78
  4. Step 4: Simplify right side
    5,640.72x = 35,263,708.97
  5. Step 5: Solve for x
    x = 35,263,708.97/5,640.72
  6. Step 6: Final answer
    x = 6,251.63

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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.