Home / 3,851.15-5,777.13-1,218.72

Finding the Fourth Proportional to 3,851.15, 5,777.13 and 1,218.72

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Solution

The fourth proportional to 3,851.15, 5,777.13 and 1,218.72 is: 1,828.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.15 : 5,777.13 = 1,218.72 : x
  2. Step 2: Convert to fraction form
    3,851.15/5,777.13 = 1,218.72/x
  3. Step 3: Cross multiply
    3,851.15x = 5,777.13 × 1,218.72
  4. Step 4: Simplify right side
    3,851.15x = 7,040,703.87
  5. Step 5: Solve for x
    x = 7,040,703.87/3,851.15
  6. Step 6: Final answer
    x = 1,828.21

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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.