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Finding the Fourth Proportional to 640,212.53, 883,511.10 and 353,751.17

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Solution

The fourth proportional to 640,212.53, 883,511.10 and 353,751.17 is: 488,186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,212.53 : 883,511.10 = 353,751.17 : x
  2. Step 2: Convert to fraction form
    640,212.53/883,511.10 = 353,751.17/x
  3. Step 3: Cross multiply
    640,212.53x = 883,511.10 × 353,751.17
  4. Step 4: Simplify right side
    640,212.53x = 312,543,080,915.43
  5. Step 5: Solve for x
    x = 312,543,080,915.43/640,212.53
  6. Step 6: Final answer
    x = 488,186.45

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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.