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Finding the Fourth Proportional to 664,012.80, 994,831.20 and 403,876.80

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Solution

The fourth proportional to 664,012.80, 994,831.20 and 403,876.80 is: 605,092.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,012.80 : 994,831.20 = 403,876.80 : x
  2. Step 2: Convert to fraction form
    664,012.80/994,831.20 = 403,876.80/x
  3. Step 3: Cross multiply
    664,012.80x = 994,831.20 × 403,876.80
  4. Step 4: Simplify right side
    664,012.80x = 401,789,241,596.16
  5. Step 5: Solve for x
    x = 401,789,241,596.16/664,012.80
  6. Step 6: Final answer
    x = 605,092.62

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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.