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Finding the Fourth Proportional to 644,805.70, 967,208.55 and 638,584.90

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Solution

The fourth proportional to 644,805.70, 967,208.55 and 638,584.90 is: 957,877.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,805.70 : 967,208.55 = 638,584.90 : x
  2. Step 2: Convert to fraction form
    644,805.70/967,208.55 = 638,584.90/x
  3. Step 3: Cross multiply
    644,805.70x = 967,208.55 × 638,584.90
  4. Step 4: Simplify right side
    644,805.70x = 617,644,775,180.90
  5. Step 5: Solve for x
    x = 617,644,775,180.90/644,805.70
  6. Step 6: Final answer
    x = 957,877.35

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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.