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Finding the Fourth Proportional to 3,021.78, 4,532.61 and 830.49

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Solution

The fourth proportional to 3,021.78, 4,532.61 and 830.49 is: 1,245.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,021.78 : 4,532.61 = 830.49 : x
  2. Step 2: Convert to fraction form
    3,021.78/4,532.61 = 830.49/x
  3. Step 3: Cross multiply
    3,021.78x = 4,532.61 × 830.49
  4. Step 4: Simplify right side
    3,021.78x = 3,764,287.28
  5. Step 5: Solve for x
    x = 3,764,287.28/3,021.78
  6. Step 6: Final answer
    x = 1,245.72

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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.