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Finding the Fourth Proportional to 721,516.35, 995,693.72 and 399,240.03

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Solution

The fourth proportional to 721,516.35, 995,693.72 and 399,240.03 is: 550,951.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,516.35 : 995,693.72 = 399,240.03 : x
  2. Step 2: Convert to fraction form
    721,516.35/995,693.72 = 399,240.03/x
  3. Step 3: Cross multiply
    721,516.35x = 995,693.72 × 399,240.03
  4. Step 4: Simplify right side
    721,516.35x = 397,520,786,663.24
  5. Step 5: Solve for x
    x = 397,520,786,663.24/721,516.35
  6. Step 6: Final answer
    x = 550,951.88

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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.