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Finding the Fourth Proportional to 2,861.86, 4,290.90 and 1,885

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Solution

The fourth proportional to 2,861.86, 4,290.90 and 1,885 is: 2,826.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.86 : 4,290.90 = 1,885 : x
  2. Step 2: Convert to fraction form
    2,861.86/4,290.90 = 1,885/x
  3. Step 3: Cross multiply
    2,861.86x = 4,290.90 × 1,885
  4. Step 4: Simplify right side
    2,861.86x = 8,088,346.50
  5. Step 5: Solve for x
    x = 8,088,346.50/2,861.86
  6. Step 6: Final answer
    x = 2,826.26

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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.