Home / 1,201.15-1,808.80-1,168.30

Finding the Fourth Proportional to 1,201.15, 1,808.80 and 1,168.30

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Solution

The fourth proportional to 1,201.15, 1,808.80 and 1,168.30 is: 1,759.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.15 : 1,808.80 = 1,168.30 : x
  2. Step 2: Convert to fraction form
    1,201.15/1,808.80 = 1,168.30/x
  3. Step 3: Cross multiply
    1,201.15x = 1,808.80 × 1,168.30
  4. Step 4: Simplify right side
    1,201.15x = 2,113,221.04
  5. Step 5: Solve for x
    x = 2,113,221.04/1,201.15
  6. Step 6: Final answer
    x = 1,759.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.