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Finding the Fourth Proportional to 256,514.65, 384,787.83 and 85,751.72

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Solution

The fourth proportional to 256,514.65, 384,787.83 and 85,751.72 is: 128,632.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,514.65 : 384,787.83 = 85,751.72 : x
  2. Step 2: Convert to fraction form
    256,514.65/384,787.83 = 85,751.72/x
  3. Step 3: Cross multiply
    256,514.65x = 384,787.83 × 85,751.72
  4. Step 4: Simplify right side
    256,514.65x = 32,996,219,058.75
  5. Step 5: Solve for x
    x = 32,996,219,058.75/256,514.65
  6. Step 6: Final answer
    x = 128,632.89

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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.