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Finding the Fourth Proportional to 345.30, 518.03 and 162.72

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Solution

The fourth proportional to 345.30, 518.03 and 162.72 is: 244.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.30 : 518.03 = 162.72 : x
  2. Step 2: Convert to fraction form
    345.30/518.03 = 162.72/x
  3. Step 3: Cross multiply
    345.30x = 518.03 × 162.72
  4. Step 4: Simplify right side
    345.30x = 84,293.03
  5. Step 5: Solve for x
    x = 84,293.03/345.30
  6. Step 6: Final answer
    x = 244.12

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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.