Home / 2,261.47-3,120.75-1,253.22

Finding the Fourth Proportional to 2,261.47, 3,120.75 and 1,253.22

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Solution

The fourth proportional to 2,261.47, 3,120.75 and 1,253.22 is: 1,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.47 : 3,120.75 = 1,253.22 : x
  2. Step 2: Convert to fraction form
    2,261.47/3,120.75 = 1,253.22/x
  3. Step 3: Cross multiply
    2,261.47x = 3,120.75 × 1,253.22
  4. Step 4: Simplify right side
    2,261.47x = 3,910,988.20
  5. Step 5: Solve for x
    x = 3,910,988.20/2,261.47
  6. Step 6: Final answer
    x = 1,729.40

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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.