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Finding the Fourth Proportional to 343.54, 515.39 and 148.46

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Solution

The fourth proportional to 343.54, 515.39 and 148.46 is: 222.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.54 : 515.39 = 148.46 : x
  2. Step 2: Convert to fraction form
    343.54/515.39 = 148.46/x
  3. Step 3: Cross multiply
    343.54x = 515.39 × 148.46
  4. Step 4: Simplify right side
    343.54x = 76,513.35
  5. Step 5: Solve for x
    x = 76,513.35/343.54
  6. Step 6: Final answer
    x = 222.72

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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.