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Finding the Fourth Proportional to 721,956.84, 996,268.14 and 399,644.16

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Solution

The fourth proportional to 721,956.84, 996,268.14 and 399,644.16 is: 551,491.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,956.84 : 996,268.14 = 399,644.16 : x
  2. Step 2: Convert to fraction form
    721,956.84/996,268.14 = 399,644.16/x
  3. Step 3: Cross multiply
    721,956.84x = 996,268.14 × 399,644.16
  4. Step 4: Simplify right side
    721,956.84x = 398,152,743,945.06
  5. Step 5: Solve for x
    x = 398,152,743,945.06/721,956.84
  6. Step 6: Final answer
    x = 551,491.06

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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.