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Finding the Fourth Proportional to 640,260.20, 883,558.77 and 353,777.78

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Solution

The fourth proportional to 640,260.20, 883,558.77 and 353,777.78 is: 488,213.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,260.20 : 883,558.77 = 353,777.78 : x
  2. Step 2: Convert to fraction form
    640,260.20/883,558.77 = 353,777.78/x
  3. Step 3: Cross multiply
    640,260.20x = 883,558.77 × 353,777.78
  4. Step 4: Simplify right side
    640,260.20x = 312,583,455,732.34
  5. Step 5: Solve for x
    x = 312,583,455,732.34/640,260.20
  6. Step 6: Final answer
    x = 488,213.16

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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.