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Finding the Fourth Proportional to 299.17, 412.73 and 210.78

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Solution

The fourth proportional to 299.17, 412.73 and 210.78 is: 290.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.17 : 412.73 = 210.78 : x
  2. Step 2: Convert to fraction form
    299.17/412.73 = 210.78/x
  3. Step 3: Cross multiply
    299.17x = 412.73 × 210.78
  4. Step 4: Simplify right side
    299.17x = 86,995.23
  5. Step 5: Solve for x
    x = 86,995.23/299.17
  6. Step 6: Final answer
    x = 290.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.