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Finding the Fourth Proportional to 369.68, 553.78 and 247.28

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Solution

The fourth proportional to 369.68, 553.78 and 247.28 is: 370.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.68 : 553.78 = 247.28 : x
  2. Step 2: Convert to fraction form
    369.68/553.78 = 247.28/x
  3. Step 3: Cross multiply
    369.68x = 553.78 × 247.28
  4. Step 4: Simplify right side
    369.68x = 136,938.72
  5. Step 5: Solve for x
    x = 136,938.72/369.68
  6. Step 6: Final answer
    x = 370.43

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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.