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Finding the Fourth Proportional to 722,190.90, 996,611.27 and 399,894.08

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Solution

The fourth proportional to 722,190.90, 996,611.27 and 399,894.08 is: 551,847.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,190.90 : 996,611.27 = 399,894.08 : x
  2. Step 2: Convert to fraction form
    722,190.90/996,611.27 = 399,894.08/x
  3. Step 3: Cross multiply
    722,190.90x = 996,611.27 × 399,894.08
  4. Step 4: Simplify right side
    722,190.90x = 398,538,939,951.76
  5. Step 5: Solve for x
    x = 398,538,939,951.76/722,190.90
  6. Step 6: Final answer
    x = 551,847.08

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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.