Home / 2,791.21-3,851.86-1,728.77

Finding the Fourth Proportional to 2,791.21, 3,851.86 and 1,728.77

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Solution

The fourth proportional to 2,791.21, 3,851.86 and 1,728.77 is: 2,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.21 : 3,851.86 = 1,728.77 : x
  2. Step 2: Convert to fraction form
    2,791.21/3,851.86 = 1,728.77/x
  3. Step 3: Cross multiply
    2,791.21x = 3,851.86 × 1,728.77
  4. Step 4: Simplify right side
    2,791.21x = 6,658,980.01
  5. Step 5: Solve for x
    x = 6,658,980.01/2,791.21
  6. Step 6: Final answer
    x = 2,385.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.