Home / 1,286.04-1,771.26-1,111.32

Finding the Fourth Proportional to 1,286.04, 1,771.26 and 1,111.32

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Solution

The fourth proportional to 1,286.04, 1,771.26 and 1,111.32 is: 1,530.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.04 : 1,771.26 = 1,111.32 : x
  2. Step 2: Convert to fraction form
    1,286.04/1,771.26 = 1,111.32/x
  3. Step 3: Cross multiply
    1,286.04x = 1,771.26 × 1,111.32
  4. Step 4: Simplify right side
    1,286.04x = 1,968,436.66
  5. Step 5: Solve for x
    x = 1,968,436.66/1,286.04
  6. Step 6: Final answer
    x = 1,530.62

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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.