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Finding the Fourth Proportional to 618,398.97, 853,425.66 and 346,554.51

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Solution

The fourth proportional to 618,398.97, 853,425.66 and 346,554.51 is: 478,264.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,398.97 : 853,425.66 = 346,554.51 : x
  2. Step 2: Convert to fraction form
    618,398.97/853,425.66 = 346,554.51/x
  3. Step 3: Cross multiply
    618,398.97x = 853,425.66 × 346,554.51
  4. Step 4: Simplify right side
    618,398.97x = 295,758,511,422.73
  5. Step 5: Solve for x
    x = 295,758,511,422.73/618,398.97
  6. Step 6: Final answer
    x = 478,264.88

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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.