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Finding the Fourth Proportional to 2,860.15, 4,290.92 and 885.73

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Solution

The fourth proportional to 2,860.15, 4,290.92 and 885.73 is: 1,328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.15 : 4,290.92 = 885.73 : x
  2. Step 2: Convert to fraction form
    2,860.15/4,290.92 = 885.73/x
  3. Step 3: Cross multiply
    2,860.15x = 4,290.92 × 885.73
  4. Step 4: Simplify right side
    2,860.15x = 3,800,596.57
  5. Step 5: Solve for x
    x = 3,800,596.57/2,860.15
  6. Step 6: Final answer
    x = 1,328.81

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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.