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Finding the Fourth Proportional to 606,930.10, 911,379.30 and 439,624.60

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Solution

The fourth proportional to 606,930.10, 911,379.30 and 439,624.60 is: 660,149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,930.10 : 911,379.30 = 439,624.60 : x
  2. Step 2: Convert to fraction form
    606,930.10/911,379.30 = 439,624.60/x
  3. Step 3: Cross multiply
    606,930.10x = 911,379.30 × 439,624.60
  4. Step 4: Simplify right side
    606,930.10x = 400,664,760,210.78
  5. Step 5: Solve for x
    x = 400,664,760,210.78/606,930.10
  6. Step 6: Final answer
    x = 660,149.76

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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.