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Finding the Fourth Proportional to 570,131.64, 786,728.09 and 385,995.69

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Solution

The fourth proportional to 570,131.64, 786,728.09 and 385,995.69 is: 532,637.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,131.64 : 786,728.09 = 385,995.69 : x
  2. Step 2: Convert to fraction form
    570,131.64/786,728.09 = 385,995.69/x
  3. Step 3: Cross multiply
    570,131.64x = 786,728.09 × 385,995.69
  4. Step 4: Simplify right side
    570,131.64x = 303,673,652,906.92
  5. Step 5: Solve for x
    x = 303,673,652,906.92/570,131.64
  6. Step 6: Final answer
    x = 532,637.78

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Similar ratio
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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.