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Finding the Fourth Proportional to 357.79, 536.59 and 126.67

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Solution

The fourth proportional to 357.79, 536.59 and 126.67 is: 189.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.79 : 536.59 = 126.67 : x
  2. Step 2: Convert to fraction form
    357.79/536.59 = 126.67/x
  3. Step 3: Cross multiply
    357.79x = 536.59 × 126.67
  4. Step 4: Simplify right side
    357.79x = 67,969.86
  5. Step 5: Solve for x
    x = 67,969.86/357.79
  6. Step 6: Final answer
    x = 189.97

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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.