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Finding the Fourth Proportional to 3,004.20, 4,505.76 and 813.09

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Solution

The fourth proportional to 3,004.20, 4,505.76 and 813.09 is: 1,219.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,004.20 : 4,505.76 = 813.09 : x
  2. Step 2: Convert to fraction form
    3,004.20/4,505.76 = 813.09/x
  3. Step 3: Cross multiply
    3,004.20x = 4,505.76 × 813.09
  4. Step 4: Simplify right side
    3,004.20x = 3,663,588.40
  5. Step 5: Solve for x
    x = 3,663,588.40/3,004.20
  6. Step 6: Final answer
    x = 1,219.49

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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.