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Finding the Fourth Proportional to 4,321.31, 6,481.98 and 2,931.21

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Solution

The fourth proportional to 4,321.31, 6,481.98 and 2,931.21 is: 4,396.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.31 : 6,481.98 = 2,931.21 : x
  2. Step 2: Convert to fraction form
    4,321.31/6,481.98 = 2,931.21/x
  3. Step 3: Cross multiply
    4,321.31x = 6,481.98 × 2,931.21
  4. Step 4: Simplify right side
    4,321.31x = 19,000,044.60
  5. Step 5: Solve for x
    x = 19,000,044.60/4,321.31
  6. Step 6: Final answer
    x = 4,396.82

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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.