Home / 2,212.30-3,317.36-1,288.18

Finding the Fourth Proportional to 2,212.30, 3,317.36 and 1,288.18

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Solution

The fourth proportional to 2,212.30, 3,317.36 and 1,288.18 is: 1,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.30 : 3,317.36 = 1,288.18 : x
  2. Step 2: Convert to fraction form
    2,212.30/3,317.36 = 1,288.18/x
  3. Step 3: Cross multiply
    2,212.30x = 3,317.36 × 1,288.18
  4. Step 4: Simplify right side
    2,212.30x = 4,273,356.80
  5. Step 5: Solve for x
    x = 4,273,356.80/2,212.30
  6. Step 6: Final answer
    x = 1,931.64

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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.