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Finding the Fourth Proportional to 721,070.92, 995,047.74 and 394,378.72

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Solution

The fourth proportional to 721,070.92, 995,047.74 and 394,378.72 is: 544,226.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,070.92 : 995,047.74 = 394,378.72 : x
  2. Step 2: Convert to fraction form
    721,070.92/995,047.74 = 394,378.72/x
  3. Step 3: Cross multiply
    721,070.92x = 995,047.74 × 394,378.72
  4. Step 4: Simplify right side
    721,070.92x = 392,425,654,040.09
  5. Step 5: Solve for x
    x = 392,425,654,040.09/721,070.92
  6. Step 6: Final answer
    x = 544,226.15

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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.