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Finding the Fourth Proportional to 381,054.78, 525,735.90 and 219,888.66

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Solution

The fourth proportional to 381,054.78, 525,735.90 and 219,888.66 is: 303,377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,054.78 : 525,735.90 = 219,888.66 : x
  2. Step 2: Convert to fraction form
    381,054.78/525,735.90 = 219,888.66/x
  3. Step 3: Cross multiply
    381,054.78x = 525,735.90 × 219,888.66
  4. Step 4: Simplify right side
    381,054.78x = 115,603,362,564.89
  5. Step 5: Solve for x
    x = 115,603,362,564.89/381,054.78
  6. Step 6: Final answer
    x = 303,377.28

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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.