Home / 2,215.08-3,314.70-1,393.80

Finding the Fourth Proportional to 2,215.08, 3,314.70 and 1,393.80

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Solution

The fourth proportional to 2,215.08, 3,314.70 and 1,393.80 is: 2,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.08 : 3,314.70 = 1,393.80 : x
  2. Step 2: Convert to fraction form
    2,215.08/3,314.70 = 1,393.80/x
  3. Step 3: Cross multiply
    2,215.08x = 3,314.70 × 1,393.80
  4. Step 4: Simplify right side
    2,215.08x = 4,620,028.86
  5. Step 5: Solve for x
    x = 4,620,028.86/2,215.08
  6. Step 6: Final answer
    x = 2,085.72

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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.