Home / 2,187.76-3,282.90-890.20

Finding the Fourth Proportional to 2,187.76, 3,282.90 and 890.20

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Solution

The fourth proportional to 2,187.76, 3,282.90 and 890.20 is: 1,335.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.76 : 3,282.90 = 890.20 : x
  2. Step 2: Convert to fraction form
    2,187.76/3,282.90 = 890.20/x
  3. Step 3: Cross multiply
    2,187.76x = 3,282.90 × 890.20
  4. Step 4: Simplify right side
    2,187.76x = 2,922,437.58
  5. Step 5: Solve for x
    x = 2,922,437.58/2,187.76
  6. Step 6: Final answer
    x = 1,335.81

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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.