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Finding the Fourth Proportional to 490,615.40, 735,339.90 and 206,305.40

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Solution

The fourth proportional to 490,615.40, 735,339.90 and 206,305.40 is: 309,212.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,615.40 : 735,339.90 = 206,305.40 : x
  2. Step 2: Convert to fraction form
    490,615.40/735,339.90 = 206,305.40/x
  3. Step 3: Cross multiply
    490,615.40x = 735,339.90 × 206,305.40
  4. Step 4: Simplify right side
    490,615.40x = 151,704,592,205.46
  5. Step 5: Solve for x
    x = 151,704,592,205.46/490,615.40
  6. Step 6: Final answer
    x = 309,212.86

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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.