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Finding the Fourth Proportional to 343.63, 515.08 and 148.58

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Solution

The fourth proportional to 343.63, 515.08 and 148.58 is: 222.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.63 : 515.08 = 148.58 : x
  2. Step 2: Convert to fraction form
    343.63/515.08 = 148.58/x
  3. Step 3: Cross multiply
    343.63x = 515.08 × 148.58
  4. Step 4: Simplify right side
    343.63x = 76,529.84
  5. Step 5: Solve for x
    x = 76,529.84/343.63
  6. Step 6: Final answer
    x = 222.71

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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.