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Finding the Fourth Proportional to 308.52, 425.30 and 210.11

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Solution

The fourth proportional to 308.52, 425.30 and 210.11 is: 289.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.52 : 425.30 = 210.11 : x
  2. Step 2: Convert to fraction form
    308.52/425.30 = 210.11/x
  3. Step 3: Cross multiply
    308.52x = 425.30 × 210.11
  4. Step 4: Simplify right side
    308.52x = 89,356.61
  5. Step 5: Solve for x
    x = 89,356.61/308.52
  6. Step 6: Final answer
    x = 289.63

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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.