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Finding the Fourth Proportional to 248.64, 343.28 and 150.45

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Solution

The fourth proportional to 248.64, 343.28 and 150.45 is: 207.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.64 : 343.28 = 150.45 : x
  2. Step 2: Convert to fraction form
    248.64/343.28 = 150.45/x
  3. Step 3: Cross multiply
    248.64x = 343.28 × 150.45
  4. Step 4: Simplify right side
    248.64x = 51,647.62
  5. Step 5: Solve for x
    x = 51,647.62/248.64
  6. Step 6: Final answer
    x = 207.72

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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.