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Finding the Fourth Proportional to 748.84, 1,123.74 and 363.88

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Solution

The fourth proportional to 748.84, 1,123.74 and 363.88 is: 546.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.84 : 1,123.74 = 363.88 : x
  2. Step 2: Convert to fraction form
    748.84/1,123.74 = 363.88/x
  3. Step 3: Cross multiply
    748.84x = 1,123.74 × 363.88
  4. Step 4: Simplify right side
    748.84x = 408,906.51
  5. Step 5: Solve for x
    x = 408,906.51/748.84
  6. Step 6: Final answer
    x = 546.05

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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.