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Finding the Fourth Proportional to 640,617.96, 961,126.84 and 191,356.56

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Solution

The fourth proportional to 640,617.96, 961,126.84 and 191,356.56 is: 287,094.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,617.96 : 961,126.84 = 191,356.56 : x
  2. Step 2: Convert to fraction form
    640,617.96/961,126.84 = 191,356.56/x
  3. Step 3: Cross multiply
    640,617.96x = 961,126.84 × 191,356.56
  4. Step 4: Simplify right side
    640,617.96x = 183,917,925,826.07
  5. Step 5: Solve for x
    x = 183,917,925,826.07/640,617.96
  6. Step 6: Final answer
    x = 287,094.55

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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.