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Finding the Fourth Proportional to 269.06, 371.79 and 210.20

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Solution

The fourth proportional to 269.06, 371.79 and 210.20 is: 290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.06 : 371.79 = 210.20 : x
  2. Step 2: Convert to fraction form
    269.06/371.79 = 210.20/x
  3. Step 3: Cross multiply
    269.06x = 371.79 × 210.20
  4. Step 4: Simplify right side
    269.06x = 78,148.80
  5. Step 5: Solve for x
    x = 78,148.80/269.06
  6. Step 6: Final answer
    x = 290.45

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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.