Home / 2,215.06-3,322.23-1,287.70

Finding the Fourth Proportional to 2,215.06, 3,322.23 and 1,287.70

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Solution

The fourth proportional to 2,215.06, 3,322.23 and 1,287.70 is: 1,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.06 : 3,322.23 = 1,287.70 : x
  2. Step 2: Convert to fraction form
    2,215.06/3,322.23 = 1,287.70/x
  3. Step 3: Cross multiply
    2,215.06x = 3,322.23 × 1,287.70
  4. Step 4: Simplify right side
    2,215.06x = 4,278,035.57
  5. Step 5: Solve for x
    x = 4,278,035.57/2,215.06
  6. Step 6: Final answer
    x = 1,931.34

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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.