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Finding the Fourth Proportional to 612,786.56, 919,178.37 and 291,964.59

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Solution

The fourth proportional to 612,786.56, 919,178.37 and 291,964.59 is: 437,946.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,786.56 : 919,178.37 = 291,964.59 : x
  2. Step 2: Convert to fraction form
    612,786.56/919,178.37 = 291,964.59/x
  3. Step 3: Cross multiply
    612,786.56x = 919,178.37 × 291,964.59
  4. Step 4: Simplify right side
    612,786.56x = 268,367,535,933.92
  5. Step 5: Solve for x
    x = 268,367,535,933.92/612,786.56
  6. Step 6: Final answer
    x = 437,946.19

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Double scale
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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.