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Finding the Fourth Proportional to 618,356.44, 853,138.20 and 346,387.60

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Solution

The fourth proportional to 618,356.44, 853,138.20 and 346,387.60 is: 477,906.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,356.44 : 853,138.20 = 346,387.60 : x
  2. Step 2: Convert to fraction form
    618,356.44/853,138.20 = 346,387.60/x
  3. Step 3: Cross multiply
    618,356.44x = 853,138.20 × 346,387.60
  4. Step 4: Simplify right side
    618,356.44x = 295,516,493,566.32
  5. Step 5: Solve for x
    x = 295,516,493,566.32/618,356.44
  6. Step 6: Final answer
    x = 477,906.39

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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.