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Finding the Fourth Proportional to 1,179,145, 1,627,221.72 and 642,601

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Solution

The fourth proportional to 1,179,145, 1,627,221.72 and 642,601 is: 886,790.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179,145 : 1,627,221.72 = 642,601 : x
  2. Step 2: Convert to fraction form
    1,179,145/1,627,221.72 = 642,601/x
  3. Step 3: Cross multiply
    1,179,145x = 1,627,221.72 × 642,601
  4. Step 4: Simplify right side
    1,179,145x = 1,045,654,304,493.72
  5. Step 5: Solve for x
    x = 1,045,654,304,493.72/1,179,145
  6. Step 6: Final answer
    x = 886,790.26

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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.