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Finding the Fourth Proportional to 294.84, 406.32 and 211.80

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Solution

The fourth proportional to 294.84, 406.32 and 211.80 is: 291.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.84 : 406.32 = 211.80 : x
  2. Step 2: Convert to fraction form
    294.84/406.32 = 211.80/x
  3. Step 3: Cross multiply
    294.84x = 406.32 × 211.80
  4. Step 4: Simplify right side
    294.84x = 86,058.58
  5. Step 5: Solve for x
    x = 86,058.58/294.84
  6. Step 6: Final answer
    x = 291.88

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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.