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Finding the Fourth Proportional to 517.72, 776.49 and 270.91

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Solution

The fourth proportional to 517.72, 776.49 and 270.91 is: 406.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.72 : 776.49 = 270.91 : x
  2. Step 2: Convert to fraction form
    517.72/776.49 = 270.91/x
  3. Step 3: Cross multiply
    517.72x = 776.49 × 270.91
  4. Step 4: Simplify right side
    517.72x = 210,358.91
  5. Step 5: Solve for x
    x = 210,358.91/517.72
  6. Step 6: Final answer
    x = 406.32

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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.