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Finding the Fourth Proportional to 357.35, 536.09 and 140.90

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Solution

The fourth proportional to 357.35, 536.09 and 140.90 is: 211.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.35 : 536.09 = 140.90 : x
  2. Step 2: Convert to fraction form
    357.35/536.09 = 140.90/x
  3. Step 3: Cross multiply
    357.35x = 536.09 × 140.90
  4. Step 4: Simplify right side
    357.35x = 75,531.70
  5. Step 5: Solve for x
    x = 75,531.70/357.35
  6. Step 6: Final answer
    x = 211.37

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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.