Home / 2,187.43-3,018.22-1,291.45

Finding the Fourth Proportional to 2,187.43, 3,018.22 and 1,291.45

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Solution

The fourth proportional to 2,187.43, 3,018.22 and 1,291.45 is: 1,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.43 : 3,018.22 = 1,291.45 : x
  2. Step 2: Convert to fraction form
    2,187.43/3,018.22 = 1,291.45/x
  3. Step 3: Cross multiply
    2,187.43x = 3,018.22 × 1,291.45
  4. Step 4: Simplify right side
    2,187.43x = 3,897,858.67
  5. Step 5: Solve for x
    x = 3,897,858.67/2,187.43
  6. Step 6: Final answer
    x = 1,781.94

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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.