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Finding the Fourth Proportional to 345.28, 518.28 and 162.76

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Solution

The fourth proportional to 345.28, 518.28 and 162.76 is: 244.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.28 : 518.28 = 162.76 : x
  2. Step 2: Convert to fraction form
    345.28/518.28 = 162.76/x
  3. Step 3: Cross multiply
    345.28x = 518.28 × 162.76
  4. Step 4: Simplify right side
    345.28x = 84,355.25
  5. Step 5: Solve for x
    x = 84,355.25/345.28
  6. Step 6: Final answer
    x = 244.31

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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.