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Finding the Fourth Proportional to 640,055.56, 883,328.34 and 353,600.68

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Solution

The fourth proportional to 640,055.56, 883,328.34 and 353,600.68 is: 487,997.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,055.56 : 883,328.34 = 353,600.68 : x
  2. Step 2: Convert to fraction form
    640,055.56/883,328.34 = 353,600.68/x
  3. Step 3: Cross multiply
    640,055.56x = 883,328.34 × 353,600.68
  4. Step 4: Simplify right side
    640,055.56x = 312,345,501,687.27
  5. Step 5: Solve for x
    x = 312,345,501,687.27/640,055.56
  6. Step 6: Final answer
    x = 487,997.48

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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.