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Finding the Fourth Proportional to 611,965.91, 843,753.60 and 407,568.71

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Solution

The fourth proportional to 611,965.91, 843,753.60 and 407,568.71 is: 561,939.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,965.91 : 843,753.60 = 407,568.71 : x
  2. Step 2: Convert to fraction form
    611,965.91/843,753.60 = 407,568.71/x
  3. Step 3: Cross multiply
    611,965.91x = 843,753.60 × 407,568.71
  4. Step 4: Simplify right side
    611,965.91x = 343,887,566,309.86
  5. Step 5: Solve for x
    x = 343,887,566,309.86/611,965.91
  6. Step 6: Final answer
    x = 561,939.09

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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.