Home / 2,214.24-3,321.36-1,390

Finding the Fourth Proportional to 2,214.24, 3,321.36 and 1,390

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Solution

The fourth proportional to 2,214.24, 3,321.36 and 1,390 is: 2,085.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,214.24 : 3,321.36 = 1,390 : x
  2. Step 2: Convert to fraction form
    2,214.24/3,321.36 = 1,390/x
  3. Step 3: Cross multiply
    2,214.24x = 3,321.36 × 1,390
  4. Step 4: Simplify right side
    2,214.24x = 4,616,690.40
  5. Step 5: Solve for x
    x = 4,616,690.40/2,214.24
  6. Step 6: Final answer
    x = 2,085.00

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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.