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Finding the Fourth Proportional to 619,258.68, 853,785.81 and 401,081.94

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Solution

The fourth proportional to 619,258.68, 853,785.81 and 401,081.94 is: 552,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,258.68 : 853,785.81 = 401,081.94 : x
  2. Step 2: Convert to fraction form
    619,258.68/853,785.81 = 401,081.94/x
  3. Step 3: Cross multiply
    619,258.68x = 853,785.81 × 401,081.94
  4. Step 4: Simplify right side
    619,258.68x = 342,438,069,019.27
  5. Step 5: Solve for x
    x = 342,438,069,019.27/619,258.68
  6. Step 6: Final answer
    x = 552,980.65

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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.