Home / 2,187.90-3,283.11-1,213.92

Finding the Fourth Proportional to 2,187.90, 3,283.11 and 1,213.92

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Solution

The fourth proportional to 2,187.90, 3,283.11 and 1,213.92 is: 1,821.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.90 : 3,283.11 = 1,213.92 : x
  2. Step 2: Convert to fraction form
    2,187.90/3,283.11 = 1,213.92/x
  3. Step 3: Cross multiply
    2,187.90x = 3,283.11 × 1,213.92
  4. Step 4: Simplify right side
    2,187.90x = 3,985,432.89
  5. Step 5: Solve for x
    x = 3,985,432.89/2,187.90
  6. Step 6: Final answer
    x = 1,821.58

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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.