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Finding the Fourth Proportional to 653.75, 979.61 and 344.67

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Solution

The fourth proportional to 653.75, 979.61 and 344.67 is: 516.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.75 : 979.61 = 344.67 : x
  2. Step 2: Convert to fraction form
    653.75/979.61 = 344.67/x
  3. Step 3: Cross multiply
    653.75x = 979.61 × 344.67
  4. Step 4: Simplify right side
    653.75x = 337,640.46
  5. Step 5: Solve for x
    x = 337,640.46/653.75
  6. Step 6: Final answer
    x = 516.47

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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.