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Finding the Fourth Proportional to 308.84, 426.06 and 210.56

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Solution

The fourth proportional to 308.84, 426.06 and 210.56 is: 290.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.84 : 426.06 = 210.56 : x
  2. Step 2: Convert to fraction form
    308.84/426.06 = 210.56/x
  3. Step 3: Cross multiply
    308.84x = 426.06 × 210.56
  4. Step 4: Simplify right side
    308.84x = 89,709.06
  5. Step 5: Solve for x
    x = 89,709.06/308.84
  6. Step 6: Final answer
    x = 290.48

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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.