Home / 2,187.20-3,279.45-1,262.30

Finding the Fourth Proportional to 2,187.20, 3,279.45 and 1,262.30

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Solution

The fourth proportional to 2,187.20, 3,279.45 and 1,262.30 is: 1,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.20 : 3,279.45 = 1,262.30 : x
  2. Step 2: Convert to fraction form
    2,187.20/3,279.45 = 1,262.30/x
  3. Step 3: Cross multiply
    2,187.20x = 3,279.45 × 1,262.30
  4. Step 4: Simplify right side
    2,187.20x = 4,139,649.74
  5. Step 5: Solve for x
    x = 4,139,649.74/2,187.20
  6. Step 6: Final answer
    x = 1,892.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.