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Finding the Fourth Proportional to 721,070.57, 995,036.81 and 394,318.73

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Solution

The fourth proportional to 721,070.57, 995,036.81 and 394,318.73 is: 544,137.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,070.57 : 995,036.81 = 394,318.73 : x
  2. Step 2: Convert to fraction form
    721,070.57/995,036.81 = 394,318.73/x
  3. Step 3: Cross multiply
    721,070.57x = 995,036.81 × 394,318.73
  4. Step 4: Simplify right side
    721,070.57x = 392,361,651,738.45
  5. Step 5: Solve for x
    x = 392,361,651,738.45/721,070.57
  6. Step 6: Final answer
    x = 544,137.66

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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.