Home / 2,089.30-3,135.30-1,211.80

Finding the Fourth Proportional to 2,089.30, 3,135.30 and 1,211.80

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Solution

The fourth proportional to 2,089.30, 3,135.30 and 1,211.80 is: 1,818.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.30 : 3,135.30 = 1,211.80 : x
  2. Step 2: Convert to fraction form
    2,089.30/3,135.30 = 1,211.80/x
  3. Step 3: Cross multiply
    2,089.30x = 3,135.30 × 1,211.80
  4. Step 4: Simplify right side
    2,089.30x = 3,799,356.54
  5. Step 5: Solve for x
    x = 3,799,356.54/2,089.30
  6. Step 6: Final answer
    x = 1,818.48

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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.