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Finding the Fourth Proportional to 721,458.09, 995,641.52 and 399,162.96

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Solution

The fourth proportional to 721,458.09, 995,641.52 and 399,162.96 is: 550,861.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,458.09 : 995,641.52 = 399,162.96 : x
  2. Step 2: Convert to fraction form
    721,458.09/995,641.52 = 399,162.96/x
  3. Step 3: Cross multiply
    721,458.09x = 995,641.52 × 399,162.96
  4. Step 4: Simplify right side
    721,458.09x = 397,423,214,226.28
  5. Step 5: Solve for x
    x = 397,423,214,226.28/721,458.09
  6. Step 6: Final answer
    x = 550,861.12

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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.