Home / 721,441.09-995,618.01-399,145.94

Finding the Fourth Proportional to 721,441.09, 995,618.01 and 399,145.94

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Solution

The fourth proportional to 721,441.09, 995,618.01 and 399,145.94 is: 550,837.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,441.09 : 995,618.01 = 399,145.94 : x
  2. Step 2: Convert to fraction form
    721,441.09/995,618.01 = 399,145.94/x
  3. Step 3: Cross multiply
    721,441.09x = 995,618.01 × 399,145.94
  4. Step 4: Simplify right side
    721,441.09x = 397,396,886,482.38
  5. Step 5: Solve for x
    x = 397,396,886,482.38/721,441.09
  6. Step 6: Final answer
    x = 550,837.61

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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.