Home / 2,176.21-3,001.80-1,291.38

Finding the Fourth Proportional to 2,176.21, 3,001.80 and 1,291.38

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Solution

The fourth proportional to 2,176.21, 3,001.80 and 1,291.38 is: 1,781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.21 : 3,001.80 = 1,291.38 : x
  2. Step 2: Convert to fraction form
    2,176.21/3,001.80 = 1,291.38/x
  3. Step 3: Cross multiply
    2,176.21x = 3,001.80 × 1,291.38
  4. Step 4: Simplify right side
    2,176.21x = 3,876,464.48
  5. Step 5: Solve for x
    x = 3,876,464.48/2,176.21
  6. Step 6: Final answer
    x = 1,781.29

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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.