Home / 1,636.71-2,257.16-1,218.11

Finding the Fourth Proportional to 1,636.71, 2,257.16 and 1,218.11

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Solution

The fourth proportional to 1,636.71, 2,257.16 and 1,218.11 is: 1,679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.71 : 2,257.16 = 1,218.11 : x
  2. Step 2: Convert to fraction form
    1,636.71/2,257.16 = 1,218.11/x
  3. Step 3: Cross multiply
    1,636.71x = 2,257.16 × 1,218.11
  4. Step 4: Simplify right side
    1,636.71x = 2,749,469.17
  5. Step 5: Solve for x
    x = 2,749,469.17/1,636.71
  6. Step 6: Final answer
    x = 1,679.88

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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.