Home / 3,717.45-5,128.92-2,388.78

Finding the Fourth Proportional to 3,717.45, 5,128.92 and 2,388.78

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Solution

The fourth proportional to 3,717.45, 5,128.92 and 2,388.78 is: 3,295.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,717.45 : 5,128.92 = 2,388.78 : x
  2. Step 2: Convert to fraction form
    3,717.45/5,128.92 = 2,388.78/x
  3. Step 3: Cross multiply
    3,717.45x = 5,128.92 × 2,388.78
  4. Step 4: Simplify right side
    3,717.45x = 12,251,861.52
  5. Step 5: Solve for x
    x = 12,251,861.52/3,717.45
  6. Step 6: Final answer
    x = 3,295.77

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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.