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Finding the Fourth Proportional to 3,122.13, 4,683.17 and 813.63

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Solution

The fourth proportional to 3,122.13, 4,683.17 and 813.63 is: 1,220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.13 : 4,683.17 = 813.63 : x
  2. Step 2: Convert to fraction form
    3,122.13/4,683.17 = 813.63/x
  3. Step 3: Cross multiply
    3,122.13x = 4,683.17 × 813.63
  4. Step 4: Simplify right side
    3,122.13x = 3,810,363.54
  5. Step 5: Solve for x
    x = 3,810,363.54/3,122.13
  6. Step 6: Final answer
    x = 1,220.44

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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.