Home / 393,981,292.80-590,971,939.20-121,316,630.40

Finding the Fourth Proportional to 393,981,292.80, 590,971,939.20 and 121,316,630.40

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Solution

The fourth proportional to 393,981,292.80, 590,971,939.20 and 121,316,630.40 is: 181,974,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,981,292.80 : 590,971,939.20 = 121,316,630.40 : x
  2. Step 2: Convert to fraction form
    393,981,292.80/590,971,939.20 = 121,316,630.40/x
  3. Step 3: Cross multiply
    393,981,292.80x = 590,971,939.20 × 121,316,630.40
  4. Step 4: Simplify right side
    393,981,292.80x = 71,694,724,324,697,680
  5. Step 5: Solve for x
    x = 71,694,724,324,697,680/393,981,292.80
  6. Step 6: Final answer
    x = 181,974,945.60

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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.