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Finding the Fourth Proportional to 721,095.35, 995,071.34 and 394,343.88

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Solution

The fourth proportional to 721,095.35, 995,071.34 and 394,343.88 is: 544,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,095.35 : 995,071.34 = 394,343.88 : x
  2. Step 2: Convert to fraction form
    721,095.35/995,071.34 = 394,343.88/x
  3. Step 3: Cross multiply
    721,095.35x = 995,071.34 × 394,343.88
  4. Step 4: Simplify right side
    721,095.35x = 392,400,293,092.40
  5. Step 5: Solve for x
    x = 392,400,293,092.40/721,095.35
  6. Step 6: Final answer
    x = 544,172.55

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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.