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Finding the Fourth Proportional to 515.63, 773.79 and 342.49

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Solution

The fourth proportional to 515.63, 773.79 and 342.49 is: 513.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.63 : 773.79 = 342.49 : x
  2. Step 2: Convert to fraction form
    515.63/773.79 = 342.49/x
  3. Step 3: Cross multiply
    515.63x = 773.79 × 342.49
  4. Step 4: Simplify right side
    515.63x = 265,015.34
  5. Step 5: Solve for x
    x = 265,015.34/515.63
  6. Step 6: Final answer
    x = 513.96

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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.