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Finding the Fourth Proportional to 640,212.50, 883,511.08 and 353,751.14

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Solution

The fourth proportional to 640,212.50, 883,511.08 and 353,751.14 is: 488,186.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,212.50 : 883,511.08 = 353,751.14 : x
  2. Step 2: Convert to fraction form
    640,212.50/883,511.08 = 353,751.14/x
  3. Step 3: Cross multiply
    640,212.50x = 883,511.08 × 353,751.14
  4. Step 4: Simplify right side
    640,212.50x = 312,543,053,077.03
  5. Step 5: Solve for x
    x = 312,543,053,077.03/640,212.50
  6. Step 6: Final answer
    x = 488,186.43

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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.