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Finding the Fourth Proportional to 259.29, 388.55 and 204.58

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Solution

The fourth proportional to 259.29, 388.55 and 204.58 is: 306.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.29 : 388.55 = 204.58 : x
  2. Step 2: Convert to fraction form
    259.29/388.55 = 204.58/x
  3. Step 3: Cross multiply
    259.29x = 388.55 × 204.58
  4. Step 4: Simplify right side
    259.29x = 79,489.56
  5. Step 5: Solve for x
    x = 79,489.56/259.29
  6. Step 6: Final answer
    x = 306.57

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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.