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Finding the Fourth Proportional to 345.64, 518.46 and 324.52

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Solution

The fourth proportional to 345.64, 518.46 and 324.52 is: 486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.64 : 518.46 = 324.52 : x
  2. Step 2: Convert to fraction form
    345.64/518.46 = 324.52/x
  3. Step 3: Cross multiply
    345.64x = 518.46 × 324.52
  4. Step 4: Simplify right side
    345.64x = 168,250.64
  5. Step 5: Solve for x
    x = 168,250.64/345.64
  6. Step 6: Final answer
    x = 486.78

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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.