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Finding the Fourth Proportional to 358,728.67, 538,123.97 and 92,486.93

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Solution

The fourth proportional to 358,728.67, 538,123.97 and 92,486.93 is: 138,738.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,728.67 : 538,123.97 = 92,486.93 : x
  2. Step 2: Convert to fraction form
    358,728.67/538,123.97 = 92,486.93/x
  3. Step 3: Cross multiply
    358,728.67x = 538,123.97 × 92,486.93
  4. Step 4: Simplify right side
    358,728.67x = 49,769,433,944.71
  5. Step 5: Solve for x
    x = 49,769,433,944.71/358,728.67
  6. Step 6: Final answer
    x = 138,738.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.