Home / 981,191,913.48-1,471,990,998.78-398,926,258.20

Finding the Fourth Proportional to 981,191,913.48, 1,471,990,998.78 and 398,926,258.20

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Solution

The fourth proportional to 981,191,913.48, 1,471,990,998.78 and 398,926,258.20 is: 598,471,973.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,191,913.48 : 1,471,990,998.78 = 398,926,258.20 : x
  2. Step 2: Convert to fraction form
    981,191,913.48/1,471,990,998.78 = 398,926,258.20/x
  3. Step 3: Cross multiply
    981,191,913.48x = 1,471,990,998.78 × 398,926,258.20
  4. Step 4: Simplify right side
    981,191,913.48x = 587,215,861,247,386,112
  5. Step 5: Solve for x
    x = 587,215,861,247,386,112/981,191,913.48
  6. Step 6: Final answer
    x = 598,471,973.91

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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.