Home / 2,188.16-3,019.66-1,291.90

Finding the Fourth Proportional to 2,188.16, 3,019.66 and 1,291.90

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Solution

The fourth proportional to 2,188.16, 3,019.66 and 1,291.90 is: 1,782.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.16 : 3,019.66 = 1,291.90 : x
  2. Step 2: Convert to fraction form
    2,188.16/3,019.66 = 1,291.90/x
  3. Step 3: Cross multiply
    2,188.16x = 3,019.66 × 1,291.90
  4. Step 4: Simplify right side
    2,188.16x = 3,901,098.75
  5. Step 5: Solve for x
    x = 3,901,098.75/2,188.16
  6. Step 6: Final answer
    x = 1,782.82

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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.