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Finding the Fourth Proportional to 343.44, 515.17 and 86.94

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Solution

The fourth proportional to 343.44, 515.17 and 86.94 is: 130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.44 : 515.17 = 86.94 : x
  2. Step 2: Convert to fraction form
    343.44/515.17 = 86.94/x
  3. Step 3: Cross multiply
    343.44x = 515.17 × 86.94
  4. Step 4: Simplify right side
    343.44x = 44,788.88
  5. Step 5: Solve for x
    x = 44,788.88/343.44
  6. Step 6: Final answer
    x = 130.41

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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.