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Finding the Fourth Proportional to 411.78, 567.45 and 271.74

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Solution

The fourth proportional to 411.78, 567.45 and 271.74 is: 374.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.78 : 567.45 = 271.74 : x
  2. Step 2: Convert to fraction form
    411.78/567.45 = 271.74/x
  3. Step 3: Cross multiply
    411.78x = 567.45 × 271.74
  4. Step 4: Simplify right side
    411.78x = 154,198.86
  5. Step 5: Solve for x
    x = 154,198.86/411.78
  6. Step 6: Final answer
    x = 374.47

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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.