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Finding the Fourth Proportional to 343.20, 515.09 and 240.93

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Solution

The fourth proportional to 343.20, 515.09 and 240.93 is: 361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.20 : 515.09 = 240.93 : x
  2. Step 2: Convert to fraction form
    343.20/515.09 = 240.93/x
  3. Step 3: Cross multiply
    343.20x = 515.09 × 240.93
  4. Step 4: Simplify right side
    343.20x = 124,099.43
  5. Step 5: Solve for x
    x = 124,099.43/343.20
  6. Step 6: Final answer
    x = 361.60

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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.