Home / 3,247.80-4,478.70-1,921.56

Finding the Fourth Proportional to 3,247.80, 4,478.70 and 1,921.56

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Solution

The fourth proportional to 3,247.80, 4,478.70 and 1,921.56 is: 2,649.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,247.80 : 4,478.70 = 1,921.56 : x
  2. Step 2: Convert to fraction form
    3,247.80/4,478.70 = 1,921.56/x
  3. Step 3: Cross multiply
    3,247.80x = 4,478.70 × 1,921.56
  4. Step 4: Simplify right side
    3,247.80x = 8,606,090.77
  5. Step 5: Solve for x
    x = 8,606,090.77/3,247.80
  6. Step 6: Final answer
    x = 2,649.82

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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.