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Finding the Fourth Proportional to 721,052.72, 995,034.48 and 398,754.24

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Solution

The fourth proportional to 721,052.72, 995,034.48 and 398,754.24 is: 550,270.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,052.72 : 995,034.48 = 398,754.24 : x
  2. Step 2: Convert to fraction form
    721,052.72/995,034.48 = 398,754.24/x
  3. Step 3: Cross multiply
    721,052.72x = 995,034.48 × 398,754.24
  4. Step 4: Simplify right side
    721,052.72x = 396,774,217,846.20
  5. Step 5: Solve for x
    x = 396,774,217,846.20/721,052.72
  6. Step 6: Final answer
    x = 550,270.75

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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.