Home / 3,970.05-5,478.66-2,201.61

Finding the Fourth Proportional to 3,970.05, 5,478.66 and 2,201.61

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Solution

The fourth proportional to 3,970.05, 5,478.66 and 2,201.61 is: 3,038.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.05 : 5,478.66 = 2,201.61 : x
  2. Step 2: Convert to fraction form
    3,970.05/5,478.66 = 2,201.61/x
  3. Step 3: Cross multiply
    3,970.05x = 5,478.66 × 2,201.61
  4. Step 4: Simplify right side
    3,970.05x = 12,061,872.64
  5. Step 5: Solve for x
    x = 12,061,872.64/3,970.05
  6. Step 6: Final answer
    x = 3,038.22

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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.