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Finding the Fourth Proportional to 722,108.53, 996,540.87 and 399,818.58

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Solution

The fourth proportional to 722,108.53, 996,540.87 and 399,818.58 is: 551,766.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,108.53 : 996,540.87 = 399,818.58 : x
  2. Step 2: Convert to fraction form
    722,108.53/996,540.87 = 399,818.58/x
  3. Step 3: Cross multiply
    722,108.53x = 996,540.87 × 399,818.58
  4. Step 4: Simplify right side
    722,108.53x = 398,435,555,555.37
  5. Step 5: Solve for x
    x = 398,435,555,555.37/722,108.53
  6. Step 6: Final answer
    x = 551,766.86

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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.