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Finding the Fourth Proportional to 312,557.94, 431,329.56 and 169,318.55

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Solution

The fourth proportional to 312,557.94, 431,329.56 and 169,318.55 is: 233,659.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,557.94 : 431,329.56 = 169,318.55 : x
  2. Step 2: Convert to fraction form
    312,557.94/431,329.56 = 169,318.55/x
  3. Step 3: Cross multiply
    312,557.94x = 431,329.56 × 169,318.55
  4. Step 4: Simplify right side
    312,557.94x = 73,032,096,114.72
  5. Step 5: Solve for x
    x = 73,032,096,114.72/312,557.94
  6. Step 6: Final answer
    x = 233,659.39

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Half scale
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Double scale
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Similar ratio
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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.