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Finding the Fourth Proportional to 561,905.40, 843,635.70 and 443,710.20

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Solution

The fourth proportional to 561,905.40, 843,635.70 and 443,710.20 is: 666,179.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,905.40 : 843,635.70 = 443,710.20 : x
  2. Step 2: Convert to fraction form
    561,905.40/843,635.70 = 443,710.20/x
  3. Step 3: Cross multiply
    561,905.40x = 843,635.70 × 443,710.20
  4. Step 4: Simplify right side
    561,905.40x = 374,329,765,174.14
  5. Step 5: Solve for x
    x = 374,329,765,174.14/561,905.40
  6. Step 6: Final answer
    x = 666,179.33

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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.