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Finding the Fourth Proportional to 721,627.16, 995,820.98 and 399,350.84

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Solution

The fourth proportional to 721,627.16, 995,820.98 and 399,350.84 is: 551,090.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,627.16 : 995,820.98 = 399,350.84 : x
  2. Step 2: Convert to fraction form
    721,627.16/995,820.98 = 399,350.84/x
  3. Step 3: Cross multiply
    721,627.16x = 995,820.98 × 399,350.84
  4. Step 4: Simplify right side
    721,627.16x = 397,681,944,852.62
  5. Step 5: Solve for x
    x = 397,681,944,852.62/721,627.16
  6. Step 6: Final answer
    x = 551,090.60

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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.