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Finding the Fourth Proportional to 231.90, 347.58 and 135.24

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Solution

The fourth proportional to 231.90, 347.58 and 135.24 is: 202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.90 : 347.58 = 135.24 : x
  2. Step 2: Convert to fraction form
    231.90/347.58 = 135.24/x
  3. Step 3: Cross multiply
    231.90x = 347.58 × 135.24
  4. Step 4: Simplify right side
    231.90x = 47,006.72
  5. Step 5: Solve for x
    x = 47,006.72/231.90
  6. Step 6: Final answer
    x = 202.70

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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.