Home / 2,190.22-3,285.40-729.40

Finding the Fourth Proportional to 2,190.22, 3,285.40 and 729.40

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Solution

The fourth proportional to 2,190.22, 3,285.40 and 729.40 is: 1,094.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.22 : 3,285.40 = 729.40 : x
  2. Step 2: Convert to fraction form
    2,190.22/3,285.40 = 729.40/x
  3. Step 3: Cross multiply
    2,190.22x = 3,285.40 × 729.40
  4. Step 4: Simplify right side
    2,190.22x = 2,396,370.76
  5. Step 5: Solve for x
    x = 2,396,370.76/2,190.22
  6. Step 6: Final answer
    x = 1,094.12

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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.