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Finding the Fourth Proportional to 490,628.40, 735,359.40 and 206,318.40

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Solution

The fourth proportional to 490,628.40, 735,359.40 and 206,318.40 is: 309,232.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,628.40 : 735,359.40 = 206,318.40 : x
  2. Step 2: Convert to fraction form
    490,628.40/735,359.40 = 206,318.40/x
  3. Step 3: Cross multiply
    490,628.40x = 735,359.40 × 206,318.40
  4. Step 4: Simplify right side
    490,628.40x = 151,718,174,832.96
  5. Step 5: Solve for x
    x = 151,718,174,832.96/490,628.40
  6. Step 6: Final answer
    x = 309,232.35

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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.