Home / 3,981.20-5,491.32-2,407.28

Finding the Fourth Proportional to 3,981.20, 5,491.32 and 2,407.28

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Solution

The fourth proportional to 3,981.20, 5,491.32 and 2,407.28 is: 3,320.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.20 : 5,491.32 = 2,407.28 : x
  2. Step 2: Convert to fraction form
    3,981.20/5,491.32 = 2,407.28/x
  3. Step 3: Cross multiply
    3,981.20x = 5,491.32 × 2,407.28
  4. Step 4: Simplify right side
    3,981.20x = 13,219,144.81
  5. Step 5: Solve for x
    x = 13,219,144.81/3,981.20
  6. Step 6: Final answer
    x = 3,320.39

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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.