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Finding the Fourth Proportional to 619,081.08, 853,969.94 and 389,274.53

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Solution

The fourth proportional to 619,081.08, 853,969.94 and 389,274.53 is: 536,971.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,081.08 : 853,969.94 = 389,274.53 : x
  2. Step 2: Convert to fraction form
    619,081.08/853,969.94 = 389,274.53/x
  3. Step 3: Cross multiply
    619,081.08x = 853,969.94 × 389,274.53
  4. Step 4: Simplify right side
    619,081.08x = 332,428,742,271.19
  5. Step 5: Solve for x
    x = 332,428,742,271.19/619,081.08
  6. Step 6: Final answer
    x = 536,971.25

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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.