Home / 2,220.30-3,065.13-1,381.28

Finding the Fourth Proportional to 2,220.30, 3,065.13 and 1,381.28

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Solution

The fourth proportional to 2,220.30, 3,065.13 and 1,381.28 is: 1,906.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.30 : 3,065.13 = 1,381.28 : x
  2. Step 2: Convert to fraction form
    2,220.30/3,065.13 = 1,381.28/x
  3. Step 3: Cross multiply
    2,220.30x = 3,065.13 × 1,381.28
  4. Step 4: Simplify right side
    2,220.30x = 4,233,795.10
  5. Step 5: Solve for x
    x = 4,233,795.10/2,220.30
  6. Step 6: Final answer
    x = 1,906.86

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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.