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Finding the Fourth Proportional to 357.69, 536.53 and 212.45

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Solution

The fourth proportional to 357.69, 536.53 and 212.45 is: 318.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.69 : 536.53 = 212.45 : x
  2. Step 2: Convert to fraction form
    357.69/536.53 = 212.45/x
  3. Step 3: Cross multiply
    357.69x = 536.53 × 212.45
  4. Step 4: Simplify right side
    357.69x = 113,985.80
  5. Step 5: Solve for x
    x = 113,985.80/357.69
  6. Step 6: Final answer
    x = 318.67

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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.