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Finding the Fourth Proportional to 517, 775.74 and 192.31

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Solution

The fourth proportional to 517, 775.74 and 192.31 is: 288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    517 : 775.74 = 192.31 : x
  2. Step 2: Convert to fraction form
    517/775.74 = 192.31/x
  3. Step 3: Cross multiply
    517x = 775.74 × 192.31
  4. Step 4: Simplify right side
    517x = 149,182.56
  5. Step 5: Solve for x
    x = 149,182.56/517
  6. Step 6: Final answer
    x = 288.55

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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.