Home / 1,636.88-2,257.40-1,218.28

Finding the Fourth Proportional to 1,636.88, 2,257.40 and 1,218.28

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Solution

The fourth proportional to 1,636.88, 2,257.40 and 1,218.28 is: 1,680.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.88 : 2,257.40 = 1,218.28 : x
  2. Step 2: Convert to fraction form
    1,636.88/2,257.40 = 1,218.28/x
  3. Step 3: Cross multiply
    1,636.88x = 2,257.40 × 1,218.28
  4. Step 4: Simplify right side
    1,636.88x = 2,750,146.91
  5. Step 5: Solve for x
    x = 2,750,146.91/1,636.88
  6. Step 6: Final answer
    x = 1,680.11

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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.