Home / 722,120.72-996,582.68-399,860.80

Finding the Fourth Proportional to 722,120.72, 996,582.68 and 399,860.80

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Solution

The fourth proportional to 722,120.72, 996,582.68 and 399,860.80 is: 551,838.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,120.72 : 996,582.68 = 399,860.80 : x
  2. Step 2: Convert to fraction form
    722,120.72/996,582.68 = 399,860.80/x
  3. Step 3: Cross multiply
    722,120.72x = 996,582.68 × 399,860.80
  4. Step 4: Simplify right side
    722,120.72x = 398,494,347,690.94
  5. Step 5: Solve for x
    x = 398,494,347,690.94/722,120.72
  6. Step 6: Final answer
    x = 551,838.96

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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.