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Finding the Fourth Proportional to 721,092.16, 995,100.80 and 398,795.32

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Solution

The fourth proportional to 721,092.16, 995,100.80 and 398,795.32 is: 550,334.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,092.16 : 995,100.80 = 398,795.32 : x
  2. Step 2: Convert to fraction form
    721,092.16/995,100.80 = 398,795.32/x
  3. Step 3: Cross multiply
    721,092.16x = 995,100.80 × 398,795.32
  4. Step 4: Simplify right side
    721,092.16x = 396,841,541,968.26
  5. Step 5: Solve for x
    x = 396,841,541,968.26/721,092.16
  6. Step 6: Final answer
    x = 550,334.01

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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.