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Finding the Fourth Proportional to 251.43, 375.28 and 210.99

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Solution

The fourth proportional to 251.43, 375.28 and 210.99 is: 314.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.43 : 375.28 = 210.99 : x
  2. Step 2: Convert to fraction form
    251.43/375.28 = 210.99/x
  3. Step 3: Cross multiply
    251.43x = 375.28 × 210.99
  4. Step 4: Simplify right side
    251.43x = 79,179.80
  5. Step 5: Solve for x
    x = 79,179.80/251.43
  6. Step 6: Final answer
    x = 314.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.