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Finding the Fourth Proportional to 722,106.22, 996,537.72 and 399,816.28

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Solution

The fourth proportional to 722,106.22, 996,537.72 and 399,816.28 is: 551,763.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,106.22 : 996,537.72 = 399,816.28 : x
  2. Step 2: Convert to fraction form
    722,106.22/996,537.72 = 399,816.28/x
  3. Step 3: Cross multiply
    722,106.22x = 996,537.72 × 399,816.28
  4. Step 4: Simplify right side
    722,106.22x = 398,432,004,090.08
  5. Step 5: Solve for x
    x = 398,432,004,090.08/722,106.22
  6. Step 6: Final answer
    x = 551,763.71

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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.