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Finding the Fourth Proportional to 517.44, 776.35 and 243.57

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Solution

The fourth proportional to 517.44, 776.35 and 243.57 is: 365.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.44 : 776.35 = 243.57 : x
  2. Step 2: Convert to fraction form
    517.44/776.35 = 243.57/x
  3. Step 3: Cross multiply
    517.44x = 776.35 × 243.57
  4. Step 4: Simplify right side
    517.44x = 189,094.48
  5. Step 5: Solve for x
    x = 189,094.48/517.44
  6. Step 6: Final answer
    x = 365.44

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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.