Home / 3,818.78-5,731.77-1,971.20

Finding the Fourth Proportional to 3,818.78, 5,731.77 and 1,971.20

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Solution

The fourth proportional to 3,818.78, 5,731.77 and 1,971.20 is: 2,958.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,818.78 : 5,731.77 = 1,971.20 : x
  2. Step 2: Convert to fraction form
    3,818.78/5,731.77 = 1,971.20/x
  3. Step 3: Cross multiply
    3,818.78x = 5,731.77 × 1,971.20
  4. Step 4: Simplify right side
    3,818.78x = 11,298,465.02
  5. Step 5: Solve for x
    x = 11,298,465.02/3,818.78
  6. Step 6: Final answer
    x = 2,958.66

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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.