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Finding the Fourth Proportional to 620,234.48, 856,016.17 and 378,657.11

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Solution

The fourth proportional to 620,234.48, 856,016.17 and 378,657.11 is: 522,603.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,234.48 : 856,016.17 = 378,657.11 : x
  2. Step 2: Convert to fraction form
    620,234.48/856,016.17 = 378,657.11/x
  3. Step 3: Cross multiply
    620,234.48x = 856,016.17 × 378,657.11
  4. Step 4: Simplify right side
    620,234.48x = 324,136,610,238.87
  5. Step 5: Solve for x
    x = 324,136,610,238.87/620,234.48
  6. Step 6: Final answer
    x = 522,603.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.