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Finding the Fourth Proportional to 325,965.60, 489,153.60 and 138,974.40

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Solution

The fourth proportional to 325,965.60, 489,153.60 and 138,974.40 is: 208,549.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,965.60 : 489,153.60 = 138,974.40 : x
  2. Step 2: Convert to fraction form
    325,965.60/489,153.60 = 138,974.40/x
  3. Step 3: Cross multiply
    325,965.60x = 489,153.60 × 138,974.40
  4. Step 4: Simplify right side
    325,965.60x = 67,979,828,067.84
  5. Step 5: Solve for x
    x = 67,979,828,067.84/325,965.60
  6. Step 6: Final answer
    x = 208,549.09

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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.