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Finding the Fourth Proportional to 685,221.58, 945,963.93 and 427,177.18

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Solution

The fourth proportional to 685,221.58, 945,963.93 and 427,177.18 is: 589,727.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,221.58 : 945,963.93 = 427,177.18 : x
  2. Step 2: Convert to fraction form
    685,221.58/945,963.93 = 427,177.18/x
  3. Step 3: Cross multiply
    685,221.58x = 945,963.93 × 427,177.18
  4. Step 4: Simplify right side
    685,221.58x = 404,094,203,999.12
  5. Step 5: Solve for x
    x = 404,094,203,999.12/685,221.58
  6. Step 6: Final answer
    x = 589,727.78

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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.