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Finding the Fourth Proportional to 640,173.62, 883,162.06 and 385,377.19

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Solution

The fourth proportional to 640,173.62, 883,162.06 and 385,377.19 is: 531,653.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,173.62 : 883,162.06 = 385,377.19 : x
  2. Step 2: Convert to fraction form
    640,173.62/883,162.06 = 385,377.19/x
  3. Step 3: Cross multiply
    640,173.62x = 883,162.06 × 385,377.19
  4. Step 4: Simplify right side
    640,173.62x = 340,350,509,826.06
  5. Step 5: Solve for x
    x = 340,350,509,826.06/640,173.62
  6. Step 6: Final answer
    x = 531,653.44

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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.