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Finding the Fourth Proportional to 490,623.40, 735,351.90 and 206,313.40

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Solution

The fourth proportional to 490,623.40, 735,351.90 and 206,313.40 is: 309,224.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,623.40 : 735,351.90 = 206,313.40 : x
  2. Step 2: Convert to fraction form
    490,623.40/735,351.90 = 206,313.40/x
  3. Step 3: Cross multiply
    490,623.40x = 735,351.90 × 206,313.40
  4. Step 4: Simplify right side
    490,623.40x = 151,712,950,685.46
  5. Step 5: Solve for x
    x = 151,712,950,685.46/490,623.40
  6. Step 6: Final answer
    x = 309,224.86

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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.