Home / 2,212.40-3,053.12-1,217.69

Finding the Fourth Proportional to 2,212.40, 3,053.12 and 1,217.69

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Solution

The fourth proportional to 2,212.40, 3,053.12 and 1,217.69 is: 1,680.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.40 : 3,053.12 = 1,217.69 : x
  2. Step 2: Convert to fraction form
    2,212.40/3,053.12 = 1,217.69/x
  3. Step 3: Cross multiply
    2,212.40x = 3,053.12 × 1,217.69
  4. Step 4: Simplify right side
    2,212.40x = 3,717,741.47
  5. Step 5: Solve for x
    x = 3,717,741.47/2,212.40
  6. Step 6: Final answer
    x = 1,680.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.