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Finding the Fourth Proportional to 640,618.96, 961,128.34 and 191,357.56

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Solution

The fourth proportional to 640,618.96, 961,128.34 and 191,357.56 is: 287,096.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,618.96 : 961,128.34 = 191,357.56 : x
  2. Step 2: Convert to fraction form
    640,618.96/961,128.34 = 191,357.56/x
  3. Step 3: Cross multiply
    640,618.96x = 961,128.34 × 191,357.56
  4. Step 4: Simplify right side
    640,618.96x = 183,919,173,989.25
  5. Step 5: Solve for x
    x = 183,919,173,989.25/640,618.96
  6. Step 6: Final answer
    x = 287,096.05

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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.