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Finding the Fourth Proportional to 357.40, 536.40 and 235.72

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Solution

The fourth proportional to 357.40, 536.40 and 235.72 is: 353.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.40 : 536.40 = 235.72 : x
  2. Step 2: Convert to fraction form
    357.40/536.40 = 235.72/x
  3. Step 3: Cross multiply
    357.40x = 536.40 × 235.72
  4. Step 4: Simplify right side
    357.40x = 126,440.21
  5. Step 5: Solve for x
    x = 126,440.21/357.40
  6. Step 6: Final answer
    x = 353.78

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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.