Home / 2,187.17-3,018.29-1,255.67

Finding the Fourth Proportional to 2,187.17, 3,018.29 and 1,255.67

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Solution

The fourth proportional to 2,187.17, 3,018.29 and 1,255.67 is: 1,732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.17 : 3,018.29 = 1,255.67 : x
  2. Step 2: Convert to fraction form
    2,187.17/3,018.29 = 1,255.67/x
  3. Step 3: Cross multiply
    2,187.17x = 3,018.29 × 1,255.67
  4. Step 4: Simplify right side
    2,187.17x = 3,789,971.80
  5. Step 5: Solve for x
    x = 3,789,971.80/2,187.17
  6. Step 6: Final answer
    x = 1,732.82

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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.