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Finding the Fourth Proportional to 644,145.40, 966,218.10 and 455,188.60

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Solution

The fourth proportional to 644,145.40, 966,218.10 and 455,188.60 is: 682,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,145.40 : 966,218.10 = 455,188.60 : x
  2. Step 2: Convert to fraction form
    644,145.40/966,218.10 = 455,188.60/x
  3. Step 3: Cross multiply
    644,145.40x = 966,218.10 × 455,188.60
  4. Step 4: Simplify right side
    644,145.40x = 439,811,464,233.66
  5. Step 5: Solve for x
    x = 439,811,464,233.66/644,145.40
  6. Step 6: Final answer
    x = 682,782.90

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Double scale
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Similar ratio
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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.