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Finding the Fourth Proportional to 722,175.12, 996,589.48 and 399,878.29

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Solution

The fourth proportional to 722,175.12, 996,589.48 and 399,878.29 is: 551,825.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,175.12 : 996,589.48 = 399,878.29 : x
  2. Step 2: Convert to fraction form
    722,175.12/996,589.48 = 399,878.29/x
  3. Step 3: Cross multiply
    722,175.12x = 996,589.48 × 399,878.29
  4. Step 4: Simplify right side
    722,175.12x = 398,514,497,094.39
  5. Step 5: Solve for x
    x = 398,514,497,094.39/722,175.12
  6. Step 6: Final answer
    x = 551,825.29

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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.