Home / 2,255.81-3,112.79-1,261.07

Finding the Fourth Proportional to 2,255.81, 3,112.79 and 1,261.07

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Solution

The fourth proportional to 2,255.81, 3,112.79 and 1,261.07 is: 1,740.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.81 : 3,112.79 = 1,261.07 : x
  2. Step 2: Convert to fraction form
    2,255.81/3,112.79 = 1,261.07/x
  3. Step 3: Cross multiply
    2,255.81x = 3,112.79 × 1,261.07
  4. Step 4: Simplify right side
    2,255.81x = 3,925,424.22
  5. Step 5: Solve for x
    x = 3,925,424.22/2,255.81
  6. Step 6: Final answer
    x = 1,740.14

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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.