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Finding the Fourth Proportional to 368.30, 552.28 and 137.20

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Solution

The fourth proportional to 368.30, 552.28 and 137.20 is: 205.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.30 : 552.28 = 137.20 : x
  2. Step 2: Convert to fraction form
    368.30/552.28 = 137.20/x
  3. Step 3: Cross multiply
    368.30x = 552.28 × 137.20
  4. Step 4: Simplify right side
    368.30x = 75,772.82
  5. Step 5: Solve for x
    x = 75,772.82/368.30
  6. Step 6: Final answer
    x = 205.74

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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.