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Finding the Fourth Proportional to 611,588.10, 917,382.15 and 256,856.70

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Solution

The fourth proportional to 611,588.10, 917,382.15 and 256,856.70 is: 385,285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,588.10 : 917,382.15 = 256,856.70 : x
  2. Step 2: Convert to fraction form
    611,588.10/917,382.15 = 256,856.70/x
  3. Step 3: Cross multiply
    611,588.10x = 917,382.15 × 256,856.70
  4. Step 4: Simplify right side
    611,588.10x = 235,635,751,687.91
  5. Step 5: Solve for x
    x = 235,635,751,687.91/611,588.10
  6. Step 6: Final answer
    x = 385,285.05

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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.