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Finding the Fourth Proportional to 722,356.80, 996,863.21 and 395,699.89

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Solution

The fourth proportional to 722,356.80, 996,863.21 and 395,699.89 is: 546,071.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,356.80 : 996,863.21 = 395,699.89 : x
  2. Step 2: Convert to fraction form
    722,356.80/996,863.21 = 395,699.89/x
  3. Step 3: Cross multiply
    722,356.80x = 996,863.21 × 395,699.89
  4. Step 4: Simplify right side
    722,356.80x = 394,458,662,542.05
  5. Step 5: Solve for x
    x = 394,458,662,542.05/722,356.80
  6. Step 6: Final answer
    x = 546,071.78

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1.5x scale

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.