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Finding the Fourth Proportional to 665,089.78, 997,782.30 and 191,738.20

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Solution

The fourth proportional to 665,089.78, 997,782.30 and 191,738.20 is: 287,649.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,089.78 : 997,782.30 = 191,738.20 : x
  2. Step 2: Convert to fraction form
    665,089.78/997,782.30 = 191,738.20/x
  3. Step 3: Cross multiply
    665,089.78x = 997,782.30 × 191,738.20
  4. Step 4: Simplify right side
    665,089.78x = 191,312,982,193.86
  5. Step 5: Solve for x
    x = 191,312,982,193.86/665,089.78
  6. Step 6: Final answer
    x = 287,649.86

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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.