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Finding the Fourth Proportional to 644,991.40, 967,487.10 and 195,711.40

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Solution

The fourth proportional to 644,991.40, 967,487.10 and 195,711.40 is: 293,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,991.40 : 967,487.10 = 195,711.40 : x
  2. Step 2: Convert to fraction form
    644,991.40/967,487.10 = 195,711.40/x
  3. Step 3: Cross multiply
    644,991.40x = 967,487.10 × 195,711.40
  4. Step 4: Simplify right side
    644,991.40x = 189,348,254,822.94
  5. Step 5: Solve for x
    x = 189,348,254,822.94/644,991.40
  6. Step 6: Final answer
    x = 293,567.10

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Half scale
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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.