Home / 1,254.09-1,890.66-1,187.13

Finding the Fourth Proportional to 1,254.09, 1,890.66 and 1,187.13

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Solution

The fourth proportional to 1,254.09, 1,890.66 and 1,187.13 is: 1,789.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.09 : 1,890.66 = 1,187.13 : x
  2. Step 2: Convert to fraction form
    1,254.09/1,890.66 = 1,187.13/x
  3. Step 3: Cross multiply
    1,254.09x = 1,890.66 × 1,187.13
  4. Step 4: Simplify right side
    1,254.09x = 2,244,459.21
  5. Step 5: Solve for x
    x = 2,244,459.21/1,254.09
  6. Step 6: Final answer
    x = 1,789.71

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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.