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Finding the Fourth Proportional to 640,200.74, 883,453.21 and 353,714.66

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Solution

The fourth proportional to 640,200.74, 883,453.21 and 353,714.66 is: 488,113.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,200.74 : 883,453.21 = 353,714.66 : x
  2. Step 2: Convert to fraction form
    640,200.74/883,453.21 = 353,714.66/x
  3. Step 3: Cross multiply
    640,200.74x = 883,453.21 × 353,714.66
  4. Step 4: Simplify right side
    640,200.74x = 312,490,351,801.06
  5. Step 5: Solve for x
    x = 312,490,351,801.06/640,200.74
  6. Step 6: Final answer
    x = 488,113.07

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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.