Home / 1,261.44-1,736.64-1,138.32

Finding the Fourth Proportional to 1,261.44, 1,736.64 and 1,138.32

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Solution

The fourth proportional to 1,261.44, 1,736.64 and 1,138.32 is: 1,567.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.44 : 1,736.64 = 1,138.32 : x
  2. Step 2: Convert to fraction form
    1,261.44/1,736.64 = 1,138.32/x
  3. Step 3: Cross multiply
    1,261.44x = 1,736.64 × 1,138.32
  4. Step 4: Simplify right side
    1,261.44x = 1,976,852.04
  5. Step 5: Solve for x
    x = 1,976,852.04/1,261.44
  6. Step 6: Final answer
    x = 1,567.14

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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.