Home / 2,186.76-3,018.74-1,290.19

Finding the Fourth Proportional to 2,186.76, 3,018.74 and 1,290.19

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Solution

The fourth proportional to 2,186.76, 3,018.74 and 1,290.19 is: 1,781.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.76 : 3,018.74 = 1,290.19 : x
  2. Step 2: Convert to fraction form
    2,186.76/3,018.74 = 1,290.19/x
  3. Step 3: Cross multiply
    2,186.76x = 3,018.74 × 1,290.19
  4. Step 4: Simplify right side
    2,186.76x = 3,894,745.48
  5. Step 5: Solve for x
    x = 3,894,745.48/2,186.76
  6. Step 6: Final answer
    x = 1,781.06

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Double scale
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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.