Home / 2,212.16-3,316.26-912.80

Finding the Fourth Proportional to 2,212.16, 3,316.26 and 912.80

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Solution

The fourth proportional to 2,212.16, 3,316.26 and 912.80 is: 1,368.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.16 : 3,316.26 = 912.80 : x
  2. Step 2: Convert to fraction form
    2,212.16/3,316.26 = 912.80/x
  3. Step 3: Cross multiply
    2,212.16x = 3,316.26 × 912.80
  4. Step 4: Simplify right side
    2,212.16x = 3,027,082.13
  5. Step 5: Solve for x
    x = 3,027,082.13/2,212.16
  6. Step 6: Final answer
    x = 1,368.38

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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.