Home / 3,970.18-5,478.67-2,201.75

Finding the Fourth Proportional to 3,970.18, 5,478.67 and 2,201.75

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Solution

The fourth proportional to 3,970.18, 5,478.67 and 2,201.75 is: 3,038.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.18 : 5,478.67 = 2,201.75 : x
  2. Step 2: Convert to fraction form
    3,970.18/5,478.67 = 2,201.75/x
  3. Step 3: Cross multiply
    3,970.18x = 5,478.67 × 2,201.75
  4. Step 4: Simplify right side
    3,970.18x = 12,062,650.66
  5. Step 5: Solve for x
    x = 12,062,650.66/3,970.18
  6. Step 6: Final answer
    x = 3,038.31

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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.