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Finding the Fourth Proportional to 342.99, 515.09 and 324.76

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Solution

The fourth proportional to 342.99, 515.09 and 324.76 is: 487.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.99 : 515.09 = 324.76 : x
  2. Step 2: Convert to fraction form
    342.99/515.09 = 324.76/x
  3. Step 3: Cross multiply
    342.99x = 515.09 × 324.76
  4. Step 4: Simplify right side
    342.99x = 167,280.63
  5. Step 5: Solve for x
    x = 167,280.63/342.99
  6. Step 6: Final answer
    x = 487.71

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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.