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Finding the Fourth Proportional to 381,894.01, 526,955.12 and 220,717.78

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Solution

The fourth proportional to 381,894.01, 526,955.12 and 220,717.78 is: 304,556.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,894.01 : 526,955.12 = 220,717.78 : x
  2. Step 2: Convert to fraction form
    381,894.01/526,955.12 = 220,717.78/x
  3. Step 3: Cross multiply
    381,894.01x = 526,955.12 × 220,717.78
  4. Step 4: Simplify right side
    381,894.01x = 116,308,362,652.75
  5. Step 5: Solve for x
    x = 116,308,362,652.75/381,894.01
  6. Step 6: Final answer
    x = 304,556.66

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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.