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Finding the Fourth Proportional to 722,191.84, 996,612.56 and 399,895.01

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Solution

The fourth proportional to 722,191.84, 996,612.56 and 399,895.01 is: 551,848.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,191.84 : 996,612.56 = 399,895.01 : x
  2. Step 2: Convert to fraction form
    722,191.84/996,612.56 = 399,895.01/x
  3. Step 3: Cross multiply
    722,191.84x = 996,612.56 × 399,895.01
  4. Step 4: Simplify right side
    722,191.84x = 398,540,389,647.33
  5. Step 5: Solve for x
    x = 398,540,389,647.33/722,191.84
  6. Step 6: Final answer
    x = 551,848.37

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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.