Home / 2,261.61-3,121-1,266.90

Finding the Fourth Proportional to 2,261.61, 3,121 and 1,266.90

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Solution

The fourth proportional to 2,261.61, 3,121 and 1,266.90 is: 1,748.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.61 : 3,121 = 1,266.90 : x
  2. Step 2: Convert to fraction form
    2,261.61/3,121 = 1,266.90/x
  3. Step 3: Cross multiply
    2,261.61x = 3,121 × 1,266.90
  4. Step 4: Simplify right side
    2,261.61x = 3,953,979.30
  5. Step 5: Solve for x
    x = 3,953,979.30/2,261.61
  6. Step 6: Final answer
    x = 1,748.30

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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.