Home / 2,261.98-3,121.65-1,267.20

Finding the Fourth Proportional to 2,261.98, 3,121.65 and 1,267.20

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Solution

The fourth proportional to 2,261.98, 3,121.65 and 1,267.20 is: 1,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.98 : 3,121.65 = 1,267.20 : x
  2. Step 2: Convert to fraction form
    2,261.98/3,121.65 = 1,267.20/x
  3. Step 3: Cross multiply
    2,261.98x = 3,121.65 × 1,267.20
  4. Step 4: Simplify right side
    2,261.98x = 3,955,754.88
  5. Step 5: Solve for x
    x = 3,955,754.88/2,261.98
  6. Step 6: Final answer
    x = 1,748.80

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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.