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Finding the Fourth Proportional to 505,879.20, 758,818.80 and 393,904.80

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Solution

The fourth proportional to 505,879.20, 758,818.80 and 393,904.80 is: 590,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,879.20 : 758,818.80 = 393,904.80 : x
  2. Step 2: Convert to fraction form
    505,879.20/758,818.80 = 393,904.80/x
  3. Step 3: Cross multiply
    505,879.20x = 758,818.80 × 393,904.80
  4. Step 4: Simplify right side
    505,879.20x = 298,902,367,650.24
  5. Step 5: Solve for x
    x = 298,902,367,650.24/505,879.20
  6. Step 6: Final answer
    x = 590,857.20

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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.