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Finding the Fourth Proportional to 722,090.61, 996,492.92 and 399,806.37

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Solution

The fourth proportional to 722,090.61, 996,492.92 and 399,806.37 is: 551,737.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,090.61 : 996,492.92 = 399,806.37 : x
  2. Step 2: Convert to fraction form
    722,090.61/996,492.92 = 399,806.37/x
  3. Step 3: Cross multiply
    722,090.61x = 996,492.92 × 399,806.37
  4. Step 4: Simplify right side
    722,090.61x = 398,404,215,076.87
  5. Step 5: Solve for x
    x = 398,404,215,076.87/722,090.61
  6. Step 6: Final answer
    x = 551,737.15

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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.