Home / 3,818.13-5,728.20-1,221.13

Finding the Fourth Proportional to 3,818.13, 5,728.20 and 1,221.13

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Solution

The fourth proportional to 3,818.13, 5,728.20 and 1,221.13 is: 1,832.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,818.13 : 5,728.20 = 1,221.13 : x
  2. Step 2: Convert to fraction form
    3,818.13/5,728.20 = 1,221.13/x
  3. Step 3: Cross multiply
    3,818.13x = 5,728.20 × 1,221.13
  4. Step 4: Simplify right side
    3,818.13x = 6,994,876.87
  5. Step 5: Solve for x
    x = 6,994,876.87/3,818.13
  6. Step 6: Final answer
    x = 1,832.02

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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.