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Finding the Fourth Proportional to 722,071.41, 996,525.39 and 399,781.50

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Solution

The fourth proportional to 722,071.41, 996,525.39 and 399,781.50 is: 551,735.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,071.41 : 996,525.39 = 399,781.50 : x
  2. Step 2: Convert to fraction form
    722,071.41/996,525.39 = 399,781.50/x
  3. Step 3: Cross multiply
    722,071.41x = 996,525.39 × 399,781.50
  4. Step 4: Simplify right side
    722,071.41x = 398,392,415,202.29
  5. Step 5: Solve for x
    x = 398,392,415,202.29/722,071.41
  6. Step 6: Final answer
    x = 551,735.48

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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.