Home / 722,101.70-996,531.48-399,811.78

Finding the Fourth Proportional to 722,101.70, 996,531.48 and 399,811.78

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Solution

The fourth proportional to 722,101.70, 996,531.48 and 399,811.78 is: 551,757.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,101.70 : 996,531.48 = 399,811.78 : x
  2. Step 2: Convert to fraction form
    722,101.70/996,531.48 = 399,811.78/x
  3. Step 3: Cross multiply
    722,101.70x = 996,531.48 × 399,811.78
  4. Step 4: Simplify right side
    722,101.70x = 398,425,024,844.83
  5. Step 5: Solve for x
    x = 398,425,024,844.83/722,101.70
  6. Step 6: Final answer
    x = 551,757.49

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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.