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Finding the Fourth Proportional to 665,088.78, 997,780.80 and 191,737.20

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Solution

The fourth proportional to 665,088.78, 997,780.80 and 191,737.20 is: 287,648.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,088.78 : 997,780.80 = 191,737.20 : x
  2. Step 2: Convert to fraction form
    665,088.78/997,780.80 = 191,737.20/x
  3. Step 3: Cross multiply
    665,088.78x = 997,780.80 × 191,737.20
  4. Step 4: Simplify right side
    665,088.78x = 191,311,696,805.76
  5. Step 5: Solve for x
    x = 191,311,696,805.76/665,088.78
  6. Step 6: Final answer
    x = 287,648.36

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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.