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Finding the Fourth Proportional to 517.52, 776.20 and 243.76

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Solution

The fourth proportional to 517.52, 776.20 and 243.76 is: 365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.52 : 776.20 = 243.76 : x
  2. Step 2: Convert to fraction form
    517.52/776.20 = 243.76/x
  3. Step 3: Cross multiply
    517.52x = 776.20 × 243.76
  4. Step 4: Simplify right side
    517.52x = 189,206.51
  5. Step 5: Solve for x
    x = 189,206.51/517.52
  6. Step 6: Final answer
    x = 365.60

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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.