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Finding the Fourth Proportional to 640,137.33, 883,407.06 and 353,675.57

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Solution

The fourth proportional to 640,137.33, 883,407.06 and 353,675.57 is: 488,081.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,137.33 : 883,407.06 = 353,675.57 : x
  2. Step 2: Convert to fraction form
    640,137.33/883,407.06 = 353,675.57/x
  3. Step 3: Cross multiply
    640,137.33x = 883,407.06 × 353,675.57
  4. Step 4: Simplify right side
    640,137.33x = 312,439,491,070.49
  5. Step 5: Solve for x
    x = 312,439,491,070.49/640,137.33
  6. Step 6: Final answer
    x = 488,081.97

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1.5x scale

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.