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Finding the Fourth Proportional to 259,657.60, 388,708.80 and 154,422.40

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Solution

The fourth proportional to 259,657.60, 388,708.80 and 154,422.40 is: 231,171.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,657.60 : 388,708.80 = 154,422.40 : x
  2. Step 2: Convert to fraction form
    259,657.60/388,708.80 = 154,422.40/x
  3. Step 3: Cross multiply
    259,657.60x = 388,708.80 × 154,422.40
  4. Step 4: Simplify right side
    259,657.60x = 60,025,345,797.12
  5. Step 5: Solve for x
    x = 60,025,345,797.12/259,657.60
  6. Step 6: Final answer
    x = 231,171.15

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1.5x scale

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.