Home / 721,701.82-995,934.72-399,412.09

Finding the Fourth Proportional to 721,701.82, 995,934.72 and 399,412.09

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Solution

The fourth proportional to 721,701.82, 995,934.72 and 399,412.09 is: 551,181.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,701.82 : 995,934.72 = 399,412.09 : x
  2. Step 2: Convert to fraction form
    721,701.82/995,934.72 = 399,412.09/x
  3. Step 3: Cross multiply
    721,701.82x = 995,934.72 × 399,412.09
  4. Step 4: Simplify right side
    721,701.82x = 397,788,368,018.77
  5. Step 5: Solve for x
    x = 397,788,368,018.77/721,701.82
  6. Step 6: Final answer
    x = 551,181.05

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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.