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Finding the Fourth Proportional to 411.90, 568.29 and 243.81

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Solution

The fourth proportional to 411.90, 568.29 and 243.81 is: 336.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.90 : 568.29 = 243.81 : x
  2. Step 2: Convert to fraction form
    411.90/568.29 = 243.81/x
  3. Step 3: Cross multiply
    411.90x = 568.29 × 243.81
  4. Step 4: Simplify right side
    411.90x = 138,554.78
  5. Step 5: Solve for x
    x = 138,554.78/411.90
  6. Step 6: Final answer
    x = 336.38

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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.