Home / 3,851.75-5,315.52-2,279.85

Finding the Fourth Proportional to 3,851.75, 5,315.52 and 2,279.85

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Solution

The fourth proportional to 3,851.75, 5,315.52 and 2,279.85 is: 3,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.75 : 5,315.52 = 2,279.85 : x
  2. Step 2: Convert to fraction form
    3,851.75/5,315.52 = 2,279.85/x
  3. Step 3: Cross multiply
    3,851.75x = 5,315.52 × 2,279.85
  4. Step 4: Simplify right side
    3,851.75x = 12,118,576.89
  5. Step 5: Solve for x
    x = 12,118,576.89/3,851.75
  6. Step 6: Final answer
    x = 3,146.25

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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.