Home / 2,217.90-3,060.70-1,286.94

Finding the Fourth Proportional to 2,217.90, 3,060.70 and 1,286.94

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Solution

The fourth proportional to 2,217.90, 3,060.70 and 1,286.94 is: 1,775.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.90 : 3,060.70 = 1,286.94 : x
  2. Step 2: Convert to fraction form
    2,217.90/3,060.70 = 1,286.94/x
  3. Step 3: Cross multiply
    2,217.90x = 3,060.70 × 1,286.94
  4. Step 4: Simplify right side
    2,217.90x = 3,938,937.26
  5. Step 5: Solve for x
    x = 3,938,937.26/2,217.90
  6. Step 6: Final answer
    x = 1,775.98

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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.