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Finding the Fourth Proportional to 602.50, 903.96 and 217.78

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Solution

The fourth proportional to 602.50, 903.96 and 217.78 is: 326.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.50 : 903.96 = 217.78 : x
  2. Step 2: Convert to fraction form
    602.50/903.96 = 217.78/x
  3. Step 3: Cross multiply
    602.50x = 903.96 × 217.78
  4. Step 4: Simplify right side
    602.50x = 196,864.41
  5. Step 5: Solve for x
    x = 196,864.41/602.50
  6. Step 6: Final answer
    x = 326.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.