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Finding the Fourth Proportional to 742.82, 1,025.09 and 411.27

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Solution

The fourth proportional to 742.82, 1,025.09 and 411.27 is: 567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.82 : 1,025.09 = 411.27 : x
  2. Step 2: Convert to fraction form
    742.82/1,025.09 = 411.27/x
  3. Step 3: Cross multiply
    742.82x = 1,025.09 × 411.27
  4. Step 4: Simplify right side
    742.82x = 421,586.71
  5. Step 5: Solve for x
    x = 421,586.71/742.82
  6. Step 6: Final answer
    x = 567.55

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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.