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Finding the Fourth Proportional to 3,805.65, 5,245.80 and 2,860.08

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Solution

The fourth proportional to 3,805.65, 5,245.80 and 2,860.08 is: 3,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.65 : 5,245.80 = 2,860.08 : x
  2. Step 2: Convert to fraction form
    3,805.65/5,245.80 = 2,860.08/x
  3. Step 3: Cross multiply
    3,805.65x = 5,245.80 × 2,860.08
  4. Step 4: Simplify right side
    3,805.65x = 15,003,407.66
  5. Step 5: Solve for x
    x = 15,003,407.66/3,805.65
  6. Step 6: Final answer
    x = 3,942.40

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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.