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Finding the Fourth Proportional to 3,866.81, 5,336.21 and 2,098.40

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Solution

The fourth proportional to 3,866.81, 5,336.21 and 2,098.40 is: 2,895.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.81 : 5,336.21 = 2,098.40 : x
  2. Step 2: Convert to fraction form
    3,866.81/5,336.21 = 2,098.40/x
  3. Step 3: Cross multiply
    3,866.81x = 5,336.21 × 2,098.40
  4. Step 4: Simplify right side
    3,866.81x = 11,197,481.63
  5. Step 5: Solve for x
    x = 11,197,481.63/3,866.81
  6. Step 6: Final answer
    x = 2,895.80

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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.