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Finding the Fourth Proportional to 722,188.34, 996,607.72 and 399,891.50

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Solution

The fourth proportional to 722,188.34, 996,607.72 and 399,891.50 is: 551,843.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,188.34 : 996,607.72 = 399,891.50 : x
  2. Step 2: Convert to fraction form
    722,188.34/996,607.72 = 399,891.50/x
  3. Step 3: Cross multiply
    722,188.34x = 996,607.72 × 399,891.50
  4. Step 4: Simplify right side
    722,188.34x = 398,534,956,062.38
  5. Step 5: Solve for x
    x = 398,534,956,062.38/722,188.34
  6. Step 6: Final answer
    x = 551,843.52

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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.