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Finding the Fourth Proportional to 308.28, 425.88 and 210.27

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Solution

The fourth proportional to 308.28, 425.88 and 210.27 is: 290.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.28 : 425.88 = 210.27 : x
  2. Step 2: Convert to fraction form
    308.28/425.88 = 210.27/x
  3. Step 3: Cross multiply
    308.28x = 425.88 × 210.27
  4. Step 4: Simplify right side
    308.28x = 89,549.79
  5. Step 5: Solve for x
    x = 89,549.79/308.28
  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.