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Finding the Fourth Proportional to 3,205.65, 4,808.79 and 1,257.42

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Solution

The fourth proportional to 3,205.65, 4,808.79 and 1,257.42 is: 1,886.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.65 : 4,808.79 = 1,257.42 : x
  2. Step 2: Convert to fraction form
    3,205.65/4,808.79 = 1,257.42/x
  3. Step 3: Cross multiply
    3,205.65x = 4,808.79 × 1,257.42
  4. Step 4: Simplify right side
    3,205.65x = 6,046,668.72
  5. Step 5: Solve for x
    x = 6,046,668.72/3,205.65
  6. Step 6: Final answer
    x = 1,886.25

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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.