Home / 2,121.18-3,182.58-823.56

Finding the Fourth Proportional to 2,121.18, 3,182.58 and 823.56

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Solution

The fourth proportional to 2,121.18, 3,182.58 and 823.56 is: 1,235.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.18 : 3,182.58 = 823.56 : x
  2. Step 2: Convert to fraction form
    2,121.18/3,182.58 = 823.56/x
  3. Step 3: Cross multiply
    2,121.18x = 3,182.58 × 823.56
  4. Step 4: Simplify right side
    2,121.18x = 2,621,045.58
  5. Step 5: Solve for x
    x = 2,621,045.58/2,121.18
  6. Step 6: Final answer
    x = 1,235.65

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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.