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Finding the Fourth Proportional to 721,039.08, 995,120.46 and 419,233.08

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Solution

The fourth proportional to 721,039.08, 995,120.46 and 419,233.08 is: 578,591.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,039.08 : 995,120.46 = 419,233.08 : x
  2. Step 2: Convert to fraction form
    721,039.08/995,120.46 = 419,233.08/x
  3. Step 3: Cross multiply
    721,039.08x = 995,120.46 × 419,233.08
  4. Step 4: Simplify right side
    721,039.08x = 417,187,415,416.82
  5. Step 5: Solve for x
    x = 417,187,415,416.82/721,039.08
  6. Step 6: Final answer
    x = 578,591.96

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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.