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Finding the Fourth Proportional to 259,725.60, 388,810.80 and 154,490.40

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Solution

The fourth proportional to 259,725.60, 388,810.80 and 154,490.40 is: 231,273.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,725.60 : 388,810.80 = 154,490.40 : x
  2. Step 2: Convert to fraction form
    259,725.60/388,810.80 = 154,490.40/x
  3. Step 3: Cross multiply
    259,725.60x = 388,810.80 × 154,490.40
  4. Step 4: Simplify right side
    259,725.60x = 60,067,536,016.32
  5. Step 5: Solve for x
    x = 60,067,536,016.32/259,725.60
  6. Step 6: Final answer
    x = 231,273.07

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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.