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Finding the Fourth Proportional to 722,175.28, 996,589.72 and 399,878.44

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Solution

The fourth proportional to 722,175.28, 996,589.72 and 399,878.44 is: 551,825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,175.28 : 996,589.72 = 399,878.44 : x
  2. Step 2: Convert to fraction form
    722,175.28/996,589.72 = 399,878.44/x
  3. Step 3: Cross multiply
    722,175.28x = 996,589.72 × 399,878.44
  4. Step 4: Simplify right side
    722,175.28x = 398,514,742,553.64
  5. Step 5: Solve for x
    x = 398,514,742,553.64/722,175.28
  6. Step 6: Final answer
    x = 551,825.51

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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.