Home / 3,305.12-4,561.20-1,978.56

Finding the Fourth Proportional to 3,305.12, 4,561.20 and 1,978.56

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Solution

The fourth proportional to 3,305.12, 4,561.20 and 1,978.56 is: 2,730.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,305.12 : 4,561.20 = 1,978.56 : x
  2. Step 2: Convert to fraction form
    3,305.12/4,561.20 = 1,978.56/x
  3. Step 3: Cross multiply
    3,305.12x = 4,561.20 × 1,978.56
  4. Step 4: Simplify right side
    3,305.12x = 9,024,607.87
  5. Step 5: Solve for x
    x = 9,024,607.87/3,305.12
  6. Step 6: Final answer
    x = 2,730.49

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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.