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Finding the Fourth Proportional to 644,905.70, 967,358.55 and 171,638.90

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Solution

The fourth proportional to 644,905.70, 967,358.55 and 171,638.90 is: 257,458.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,905.70 : 967,358.55 = 171,638.90 : x
  2. Step 2: Convert to fraction form
    644,905.70/967,358.55 = 171,638.90/x
  3. Step 3: Cross multiply
    644,905.70x = 967,358.55 × 171,638.90
  4. Step 4: Simplify right side
    644,905.70x = 166,036,357,427.60
  5. Step 5: Solve for x
    x = 166,036,357,427.60/644,905.70
  6. Step 6: Final answer
    x = 257,458.35

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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.