Home / 2,191.40-3,285.18-803.72

Finding the Fourth Proportional to 2,191.40, 3,285.18 and 803.72

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Solution

The fourth proportional to 2,191.40, 3,285.18 and 803.72 is: 1,204.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.40 : 3,285.18 = 803.72 : x
  2. Step 2: Convert to fraction form
    2,191.40/3,285.18 = 803.72/x
  3. Step 3: Cross multiply
    2,191.40x = 3,285.18 × 803.72
  4. Step 4: Simplify right side
    2,191.40x = 2,640,364.87
  5. Step 5: Solve for x
    x = 2,640,364.87/2,191.40
  6. Step 6: Final answer
    x = 1,204.88

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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.