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Finding the Fourth Proportional to 275.71, 412.32 and 206.35

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Solution

The fourth proportional to 275.71, 412.32 and 206.35 is: 308.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.71 : 412.32 = 206.35 : x
  2. Step 2: Convert to fraction form
    275.71/412.32 = 206.35/x
  3. Step 3: Cross multiply
    275.71x = 412.32 × 206.35
  4. Step 4: Simplify right side
    275.71x = 85,082.23
  5. Step 5: Solve for x
    x = 85,082.23/275.71
  6. Step 6: Final answer
    x = 308.59

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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.