Home / 2,768.05-4,152.57-820.20

Finding the Fourth Proportional to 2,768.05, 4,152.57 and 820.20

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Solution

The fourth proportional to 2,768.05, 4,152.57 and 820.20 is: 1,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.05 : 4,152.57 = 820.20 : x
  2. Step 2: Convert to fraction form
    2,768.05/4,152.57 = 820.20/x
  3. Step 3: Cross multiply
    2,768.05x = 4,152.57 × 820.20
  4. Step 4: Simplify right side
    2,768.05x = 3,405,937.91
  5. Step 5: Solve for x
    x = 3,405,937.91/2,768.05
  6. Step 6: Final answer
    x = 1,230.45

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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.