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Finding the Fourth Proportional to 231.18, 346.41 and 145.50

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Solution

The fourth proportional to 231.18, 346.41 and 145.50 is: 218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.18 : 346.41 = 145.50 : x
  2. Step 2: Convert to fraction form
    231.18/346.41 = 145.50/x
  3. Step 3: Cross multiply
    231.18x = 346.41 × 145.50
  4. Step 4: Simplify right side
    231.18x = 50,402.66
  5. Step 5: Solve for x
    x = 50,402.66/231.18
  6. Step 6: Final answer
    x = 218.02

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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.