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Finding the Fourth Proportional to 722,216.70, 996,577.98 and 399,845.88

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Solution

The fourth proportional to 722,216.70, 996,577.98 and 399,845.88 is: 551,742.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,216.70 : 996,577.98 = 399,845.88 : x
  2. Step 2: Convert to fraction form
    722,216.70/996,577.98 = 399,845.88/x
  3. Step 3: Cross multiply
    722,216.70x = 996,577.98 × 399,845.88
  4. Step 4: Simplify right side
    722,216.70x = 398,477,599,401.72
  5. Step 5: Solve for x
    x = 398,477,599,401.72/722,216.70
  6. Step 6: Final answer
    x = 551,742.43

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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.