Home / 3,861.90-5,330.16-2,290.86

Finding the Fourth Proportional to 3,861.90, 5,330.16 and 2,290.86

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Solution

The fourth proportional to 3,861.90, 5,330.16 and 2,290.86 is: 3,161.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.90 : 5,330.16 = 2,290.86 : x
  2. Step 2: Convert to fraction form
    3,861.90/5,330.16 = 2,290.86/x
  3. Step 3: Cross multiply
    3,861.90x = 5,330.16 × 2,290.86
  4. Step 4: Simplify right side
    3,861.90x = 12,210,650.34
  5. Step 5: Solve for x
    x = 12,210,650.34/3,861.90
  6. Step 6: Final answer
    x = 3,161.82

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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.