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Finding the Fourth Proportional to 611,589.10, 917,383.65 and 256,857.70

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Solution

The fourth proportional to 611,589.10, 917,383.65 and 256,857.70 is: 385,286.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,589.10 : 917,383.65 = 256,857.70 : x
  2. Step 2: Convert to fraction form
    611,589.10/917,383.65 = 256,857.70/x
  3. Step 3: Cross multiply
    611,589.10x = 917,383.65 × 256,857.70
  4. Step 4: Simplify right side
    611,589.10x = 235,637,054,356.61
  5. Step 5: Solve for x
    x = 235,637,054,356.61/611,589.10
  6. Step 6: Final answer
    x = 385,286.55

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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.