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Finding the Fourth Proportional to 381,557.70, 526,551.66 and 238,400.78

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Solution

The fourth proportional to 381,557.70, 526,551.66 and 238,400.78 is: 328,994.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,557.70 : 526,551.66 = 238,400.78 : x
  2. Step 2: Convert to fraction form
    381,557.70/526,551.66 = 238,400.78/x
  3. Step 3: Cross multiply
    381,557.70x = 526,551.66 × 238,400.78
  4. Step 4: Simplify right side
    381,557.70x = 125,530,323,821.54
  5. Step 5: Solve for x
    x = 125,530,323,821.54/381,557.70
  6. Step 6: Final answer
    x = 328,994.34

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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.