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Finding the Fourth Proportional to 439,539.60, 659,309.40 and 408,046.80

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Solution

The fourth proportional to 439,539.60, 659,309.40 and 408,046.80 is: 612,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,539.60 : 659,309.40 = 408,046.80 : x
  2. Step 2: Convert to fraction form
    439,539.60/659,309.40 = 408,046.80/x
  3. Step 3: Cross multiply
    439,539.60x = 659,309.40 × 408,046.80
  4. Step 4: Simplify right side
    439,539.60x = 269,029,090,879.92
  5. Step 5: Solve for x
    x = 269,029,090,879.92/439,539.60
  6. Step 6: Final answer
    x = 612,070.20

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Similar ratio
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1.5x scale

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.