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Finding the Fourth Proportional to 505,717.80, 758,576.70 and 256,885.80

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Solution

The fourth proportional to 505,717.80, 758,576.70 and 256,885.80 is: 385,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,717.80 : 758,576.70 = 256,885.80 : x
  2. Step 2: Convert to fraction form
    505,717.80/758,576.70 = 256,885.80/x
  3. Step 3: Cross multiply
    505,717.80x = 758,576.70 × 256,885.80
  4. Step 4: Simplify right side
    505,717.80x = 194,867,582,440.86
  5. Step 5: Solve for x
    x = 194,867,582,440.86/505,717.80
  6. Step 6: Final answer
    x = 385,328.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.