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Finding the Fourth Proportional to 294.45, 406.12 and 215.74

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Solution

The fourth proportional to 294.45, 406.12 and 215.74 is: 297.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.45 : 406.12 = 215.74 : x
  2. Step 2: Convert to fraction form
    294.45/406.12 = 215.74/x
  3. Step 3: Cross multiply
    294.45x = 406.12 × 215.74
  4. Step 4: Simplify right side
    294.45x = 87,614.80
  5. Step 5: Solve for x
    x = 87,614.80/294.45
  6. Step 6: Final answer
    x = 297.55

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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.