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Finding the Fourth Proportional to 721,093.30, 995,102.96 and 398,795.11

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Solution

The fourth proportional to 721,093.30, 995,102.96 and 398,795.11 is: 550,334.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,093.30 : 995,102.96 = 398,795.11 : x
  2. Step 2: Convert to fraction form
    721,093.30/995,102.96 = 398,795.11/x
  3. Step 3: Cross multiply
    721,093.30x = 995,102.96 × 398,795.11
  4. Step 4: Simplify right side
    721,093.30x = 396,842,189,912.79
  5. Step 5: Solve for x
    x = 396,842,189,912.79/721,093.30
  6. Step 6: Final answer
    x = 550,334.04

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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.