Home / 3,970.17-5,478.76-2,201.80

Finding the Fourth Proportional to 3,970.17, 5,478.76 and 2,201.80

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Solution

The fourth proportional to 3,970.17, 5,478.76 and 2,201.80 is: 3,038.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.17 : 5,478.76 = 2,201.80 : x
  2. Step 2: Convert to fraction form
    3,970.17/5,478.76 = 2,201.80/x
  3. Step 3: Cross multiply
    3,970.17x = 5,478.76 × 2,201.80
  4. Step 4: Simplify right side
    3,970.17x = 12,063,133.77
  5. Step 5: Solve for x
    x = 12,063,133.77/3,970.17
  6. Step 6: Final answer
    x = 3,038.44

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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.