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Finding the Fourth Proportional to 640,086.36, 883,316.34 and 353,606.55

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Solution

The fourth proportional to 640,086.36, 883,316.34 and 353,606.55 is: 487,975.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,086.36 : 883,316.34 = 353,606.55 : x
  2. Step 2: Convert to fraction form
    640,086.36/883,316.34 = 353,606.55/x
  3. Step 3: Cross multiply
    640,086.36x = 883,316.34 × 353,606.55
  4. Step 4: Simplify right side
    640,086.36x = 312,346,443,546.03
  5. Step 5: Solve for x
    x = 312,346,443,546.03/640,086.36
  6. Step 6: Final answer
    x = 487,975.47

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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.