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Finding the Fourth Proportional to 518.29, 776.05 and 274.30

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Solution

The fourth proportional to 518.29, 776.05 and 274.30 is: 410.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.29 : 776.05 = 274.30 : x
  2. Step 2: Convert to fraction form
    518.29/776.05 = 274.30/x
  3. Step 3: Cross multiply
    518.29x = 776.05 × 274.30
  4. Step 4: Simplify right side
    518.29x = 212,867.89
  5. Step 5: Solve for x
    x = 212,867.89/518.29
  6. Step 6: Final answer
    x = 410.71

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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.