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Finding the Fourth Proportional to 618,580.27, 853,478.37 and 376,971.45

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Solution

The fourth proportional to 618,580.27, 853,478.37 and 376,971.45 is: 520,121.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,580.27 : 853,478.37 = 376,971.45 : x
  2. Step 2: Convert to fraction form
    618,580.27/853,478.37 = 376,971.45/x
  3. Step 3: Cross multiply
    618,580.27x = 853,478.37 × 376,971.45
  4. Step 4: Simplify right side
    618,580.27x = 321,736,978,682.54
  5. Step 5: Solve for x
    x = 321,736,978,682.54/618,580.27
  6. Step 6: Final answer
    x = 520,121.63

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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.