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Finding the Fourth Proportional to 722,131.02, 996,460.26 and 399,760.38

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Solution

The fourth proportional to 722,131.02, 996,460.26 and 399,760.38 is: 551,624.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,131.02 : 996,460.26 = 399,760.38 : x
  2. Step 2: Convert to fraction form
    722,131.02/996,460.26 = 399,760.38/x
  3. Step 3: Cross multiply
    722,131.02x = 996,460.26 × 399,760.38
  4. Step 4: Simplify right side
    722,131.02x = 398,345,332,192.50
  5. Step 5: Solve for x
    x = 398,345,332,192.50/722,131.02
  6. Step 6: Final answer
    x = 551,624.73

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.