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Finding the Fourth Proportional to 517.52, 776.40 and 274.22

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Solution

The fourth proportional to 517.52, 776.40 and 274.22 is: 411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.52 : 776.40 = 274.22 : x
  2. Step 2: Convert to fraction form
    517.52/776.40 = 274.22/x
  3. Step 3: Cross multiply
    517.52x = 776.40 × 274.22
  4. Step 4: Simplify right side
    517.52x = 212,901.10
  5. Step 5: Solve for x
    x = 212,901.10/517.52
  6. Step 6: Final answer
    x = 411.39

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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.