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Finding the Fourth Proportional to 355,881.95, 491,101.40 and 218,018.73

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Solution

The fourth proportional to 355,881.95, 491,101.40 and 218,018.73 is: 300,856.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,881.95 : 491,101.40 = 218,018.73 : x
  2. Step 2: Convert to fraction form
    355,881.95/491,101.40 = 218,018.73/x
  3. Step 3: Cross multiply
    355,881.95x = 491,101.40 × 218,018.73
  4. Step 4: Simplify right side
    355,881.95x = 107,069,304,074.27
  5. Step 5: Solve for x
    x = 107,069,304,074.27/355,881.95
  6. Step 6: Final answer
    x = 300,856.24

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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.