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Finding the Fourth Proportional to 618,551.31, 853,653.15 and 346,616.09

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Solution

The fourth proportional to 618,551.31, 853,653.15 and 346,616.09 is: 478,359.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,551.31 : 853,653.15 = 346,616.09 : x
  2. Step 2: Convert to fraction form
    618,551.31/853,653.15 = 346,616.09/x
  3. Step 3: Cross multiply
    618,551.31x = 853,653.15 × 346,616.09
  4. Step 4: Simplify right side
    618,551.31x = 295,889,912,800.92
  5. Step 5: Solve for x
    x = 295,889,912,800.92/618,551.31
  6. Step 6: Final answer
    x = 478,359.53

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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.