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Finding the Fourth Proportional to 722,117.22, 996,552.90 and 399,827.28

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Solution

The fourth proportional to 722,117.22, 996,552.90 and 399,827.28 is: 551,778.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,117.22 : 996,552.90 = 399,827.28 : x
  2. Step 2: Convert to fraction form
    722,117.22/996,552.90 = 399,827.28/x
  3. Step 3: Cross multiply
    722,117.22x = 996,552.90 × 399,827.28
  4. Step 4: Simplify right side
    722,117.22x = 398,449,035,383.11
  5. Step 5: Solve for x
    x = 398,449,035,383.11/722,117.22
  6. Step 6: Final answer
    x = 551,778.89

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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.