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Finding the Fourth Proportional to 722,137, 996,468.56 and 399,766.36

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Solution

The fourth proportional to 722,137, 996,468.56 and 399,766.36 is: 551,633.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,137 : 996,468.56 = 399,766.36 : x
  2. Step 2: Convert to fraction form
    722,137/996,468.56 = 399,766.36/x
  3. Step 3: Cross multiply
    722,137x = 996,468.56 × 399,766.36
  4. Step 4: Simplify right side
    722,137x = 398,354,609,085.64
  5. Step 5: Solve for x
    x = 398,354,609,085.64/722,137
  6. Step 6: Final answer
    x = 551,633.01

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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.