Home / 2,208.90-3,313.35-2,111.70

Finding the Fourth Proportional to 2,208.90, 3,313.35 and 2,111.70

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Solution

The fourth proportional to 2,208.90, 3,313.35 and 2,111.70 is: 3,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.90 : 3,313.35 = 2,111.70 : x
  2. Step 2: Convert to fraction form
    2,208.90/3,313.35 = 2,111.70/x
  3. Step 3: Cross multiply
    2,208.90x = 3,313.35 × 2,111.70
  4. Step 4: Simplify right side
    2,208.90x = 6,996,801.20
  5. Step 5: Solve for x
    x = 6,996,801.20/2,208.90
  6. Step 6: Final answer
    x = 3,167.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.