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Finding the Fourth Proportional to 722,191.03, 996,611.40 and 399,894.21

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Solution

The fourth proportional to 722,191.03, 996,611.40 and 399,894.21 is: 551,847.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,191.03 : 996,611.40 = 399,894.21 : x
  2. Step 2: Convert to fraction form
    722,191.03/996,611.40 = 399,894.21/x
  3. Step 3: Cross multiply
    722,191.03x = 996,611.40 × 399,894.21
  4. Step 4: Simplify right side
    722,191.03x = 398,539,128,479.99
  5. Step 5: Solve for x
    x = 398,539,128,479.99/722,191.03
  6. Step 6: Final answer
    x = 551,847.25

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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.