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Finding the Fourth Proportional to 695,809.81, 960,217.09 and 389,888.71

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Solution

The fourth proportional to 695,809.81, 960,217.09 and 389,888.71 is: 538,046.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,809.81 : 960,217.09 = 389,888.71 : x
  2. Step 2: Convert to fraction form
    695,809.81/960,217.09 = 389,888.71/x
  3. Step 3: Cross multiply
    695,809.81x = 960,217.09 × 389,888.71
  4. Step 4: Simplify right side
    695,809.81x = 374,377,797,809.38
  5. Step 5: Solve for x
    x = 374,377,797,809.38/695,809.81
  6. Step 6: Final answer
    x = 538,046.16

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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.