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Finding the Fourth Proportional to 614.46, 920.21 and 353.67

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Solution

The fourth proportional to 614.46, 920.21 and 353.67 is: 529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.46 : 920.21 = 353.67 : x
  2. Step 2: Convert to fraction form
    614.46/920.21 = 353.67/x
  3. Step 3: Cross multiply
    614.46x = 920.21 × 353.67
  4. Step 4: Simplify right side
    614.46x = 325,450.67
  5. Step 5: Solve for x
    x = 325,450.67/614.46
  6. Step 6: Final answer
    x = 529.65

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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.