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Finding the Fourth Proportional to 292.87, 439.10 and 205.71

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Solution

The fourth proportional to 292.87, 439.10 and 205.71 is: 308.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.87 : 439.10 = 205.71 : x
  2. Step 2: Convert to fraction form
    292.87/439.10 = 205.71/x
  3. Step 3: Cross multiply
    292.87x = 439.10 × 205.71
  4. Step 4: Simplify right side
    292.87x = 90,328.98
  5. Step 5: Solve for x
    x = 90,328.98/292.87
  6. Step 6: Final answer
    x = 308.43

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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.