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Finding the Fourth Proportional to 270,638.80, 405,958.20 and 83,707.60

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Solution

The fourth proportional to 270,638.80, 405,958.20 and 83,707.60 is: 125,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,638.80 : 405,958.20 = 83,707.60 : x
  2. Step 2: Convert to fraction form
    270,638.80/405,958.20 = 83,707.60/x
  3. Step 3: Cross multiply
    270,638.80x = 405,958.20 × 83,707.60
  4. Step 4: Simplify right side
    270,638.80x = 33,981,786,622.32
  5. Step 5: Solve for x
    x = 33,981,786,622.32/270,638.80
  6. Step 6: Final answer
    x = 125,561.40

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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.