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Finding the Fourth Proportional to 665,101.78, 997,800.30 and 191,750.20

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Solution

The fourth proportional to 665,101.78, 997,800.30 and 191,750.20 is: 287,667.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,101.78 : 997,800.30 = 191,750.20 : x
  2. Step 2: Convert to fraction form
    665,101.78/997,800.30 = 191,750.20/x
  3. Step 3: Cross multiply
    665,101.78x = 997,800.30 × 191,750.20
  4. Step 4: Simplify right side
    665,101.78x = 191,328,407,085.06
  5. Step 5: Solve for x
    x = 191,328,407,085.06/665,101.78
  6. Step 6: Final answer
    x = 287,667.86

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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.