Home / 1,391.46-2,085.96-1,187.34

Finding the Fourth Proportional to 1,391.46, 2,085.96 and 1,187.34

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Solution

The fourth proportional to 1,391.46, 2,085.96 and 1,187.34 is: 1,779.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.46 : 2,085.96 = 1,187.34 : x
  2. Step 2: Convert to fraction form
    1,391.46/2,085.96 = 1,187.34/x
  3. Step 3: Cross multiply
    1,391.46x = 2,085.96 × 1,187.34
  4. Step 4: Simplify right side
    1,391.46x = 2,476,743.75
  5. Step 5: Solve for x
    x = 2,476,743.75/1,391.46
  6. Step 6: Final answer
    x = 1,779.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.