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Finding the Fourth Proportional to 695,965.33, 960,416.16 and 405,558.40

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Solution

The fourth proportional to 695,965.33, 960,416.16 and 405,558.40 is: 559,661.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,965.33 : 960,416.16 = 405,558.40 : x
  2. Step 2: Convert to fraction form
    695,965.33/960,416.16 = 405,558.40/x
  3. Step 3: Cross multiply
    695,965.33x = 960,416.16 × 405,558.40
  4. Step 4: Simplify right side
    695,965.33x = 389,504,841,183.74
  5. Step 5: Solve for x
    x = 389,504,841,183.74/695,965.33
  6. Step 6: Final answer
    x = 559,661.27

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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.