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Finding the Fourth Proportional to 231.63, 347.73 and 145.17

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Solution

The fourth proportional to 231.63, 347.73 and 145.17 is: 217.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.63 : 347.73 = 145.17 : x
  2. Step 2: Convert to fraction form
    231.63/347.73 = 145.17/x
  3. Step 3: Cross multiply
    231.63x = 347.73 × 145.17
  4. Step 4: Simplify right side
    231.63x = 50,479.96
  5. Step 5: Solve for x
    x = 50,479.96/231.63
  6. Step 6: Final answer
    x = 217.93

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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.