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Finding the Fourth Proportional to 423,551.48, 635,405.92 and 139,257.95

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Solution

The fourth proportional to 423,551.48, 635,405.92 and 139,257.95 is: 208,912.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,551.48 : 635,405.92 = 139,257.95 : x
  2. Step 2: Convert to fraction form
    423,551.48/635,405.92 = 139,257.95/x
  3. Step 3: Cross multiply
    423,551.48x = 635,405.92 × 139,257.95
  4. Step 4: Simplify right side
    423,551.48x = 88,485,322,311.89
  5. Step 5: Solve for x
    x = 88,485,322,311.89/423,551.48
  6. Step 6: Final answer
    x = 208,912.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.