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Finding the Fourth Proportional to 2,805.72, 3,868.12 and 2,351.64

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Solution

The fourth proportional to 2,805.72, 3,868.12 and 2,351.64 is: 3,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.72 : 3,868.12 = 2,351.64 : x
  2. Step 2: Convert to fraction form
    2,805.72/3,868.12 = 2,351.64/x
  3. Step 3: Cross multiply
    2,805.72x = 3,868.12 × 2,351.64
  4. Step 4: Simplify right side
    2,805.72x = 9,096,425.72
  5. Step 5: Solve for x
    x = 9,096,425.72/2,805.72
  6. Step 6: Final answer
    x = 3,242.10

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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.