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Finding the Fourth Proportional to 490,601.40, 735,318.90 and 206,291.40

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Solution

The fourth proportional to 490,601.40, 735,318.90 and 206,291.40 is: 309,191.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,601.40 : 735,318.90 = 206,291.40 : x
  2. Step 2: Convert to fraction form
    490,601.40/735,318.90 = 206,291.40/x
  3. Step 3: Cross multiply
    490,601.40x = 735,318.90 × 206,291.40
  4. Step 4: Simplify right side
    490,601.40x = 151,689,965,327.46
  5. Step 5: Solve for x
    x = 151,689,965,327.46/490,601.40
  6. Step 6: Final answer
    x = 309,191.87

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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.