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Finding the Fourth Proportional to 721,625.16, 995,818.22 and 399,348.84

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Solution

The fourth proportional to 721,625.16, 995,818.22 and 399,348.84 is: 551,087.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,625.16 : 995,818.22 = 399,348.84 : x
  2. Step 2: Convert to fraction form
    721,625.16/995,818.22 = 399,348.84/x
  3. Step 3: Cross multiply
    721,625.16x = 995,818.22 × 399,348.84
  4. Step 4: Simplify right side
    721,625.16x = 397,678,851,007.87
  5. Step 5: Solve for x
    x = 397,678,851,007.87/721,625.16
  6. Step 6: Final answer
    x = 551,087.84

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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.