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Finding the Fourth Proportional to 612,712.70, 919,069.05 and 186,247.70

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Solution

The fourth proportional to 612,712.70, 919,069.05 and 186,247.70 is: 279,371.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,712.70 : 919,069.05 = 186,247.70 : x
  2. Step 2: Convert to fraction form
    612,712.70/919,069.05 = 186,247.70/x
  3. Step 3: Cross multiply
    612,712.70x = 919,069.05 × 186,247.70
  4. Step 4: Simplify right side
    612,712.70x = 171,174,496,703.69
  5. Step 5: Solve for x
    x = 171,174,496,703.69/612,712.70
  6. Step 6: Final answer
    x = 279,371.55

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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.