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Finding the Fourth Proportional to 345.45, 518.34 and 162.82

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Solution

The fourth proportional to 345.45, 518.34 and 162.82 is: 244.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.45 : 518.34 = 162.82 : x
  2. Step 2: Convert to fraction form
    345.45/518.34 = 162.82/x
  3. Step 3: Cross multiply
    345.45x = 518.34 × 162.82
  4. Step 4: Simplify right side
    345.45x = 84,393.53
  5. Step 5: Solve for x
    x = 84,393.53/345.45
  6. Step 6: Final answer
    x = 244.30

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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.