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Finding the Fourth Proportional to 347,640.20, 520,538.70 and 273,912.20

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Solution

The fourth proportional to 347,640.20, 520,538.70 and 273,912.20 is: 410,142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,640.20 : 520,538.70 = 273,912.20 : x
  2. Step 2: Convert to fraction form
    347,640.20/520,538.70 = 273,912.20/x
  3. Step 3: Cross multiply
    347,640.20x = 520,538.70 × 273,912.20
  4. Step 4: Simplify right side
    347,640.20x = 142,581,900,502.14
  5. Step 5: Solve for x
    x = 142,581,900,502.14/347,640.20
  6. Step 6: Final answer
    x = 410,142.15

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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.