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Finding the Fourth Proportional to 259,358.40, 388,600.20 and 214,743.60

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Solution

The fourth proportional to 259,358.40, 388,600.20 and 214,743.60 is: 321,753.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,358.40 : 388,600.20 = 214,743.60 : x
  2. Step 2: Convert to fraction form
    259,358.40/388,600.20 = 214,743.60/x
  3. Step 3: Cross multiply
    259,358.40x = 388,600.20 × 214,743.60
  4. Step 4: Simplify right side
    259,358.40x = 83,449,405,908.72
  5. Step 5: Solve for x
    x = 83,449,405,908.72/259,358.40
  6. Step 6: Final answer
    x = 321,753.24

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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.