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Finding the Fourth Proportional to 721,057.04, 995,018.21 and 394,305.20

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Solution

The fourth proportional to 721,057.04, 995,018.21 and 394,305.20 is: 544,119.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,057.04 : 995,018.21 = 394,305.20 : x
  2. Step 2: Convert to fraction form
    721,057.04/995,018.21 = 394,305.20/x
  3. Step 3: Cross multiply
    721,057.04x = 995,018.21 × 394,305.20
  4. Step 4: Simplify right side
    721,057.04x = 392,340,852,561.04
  5. Step 5: Solve for x
    x = 392,340,852,561.04/721,057.04
  6. Step 6: Final answer
    x = 544,119.02

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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.