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Finding the Fourth Proportional to 710,906,059.38, 981,053,911.14 and 397,640,272.52

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Solution

The fourth proportional to 710,906,059.38, 981,053,911.14 and 397,640,272.52 is: 548,745,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,906,059.38 : 981,053,911.14 = 397,640,272.52 : x
  2. Step 2: Convert to fraction form
    710,906,059.38/981,053,911.14 = 397,640,272.52/x
  3. Step 3: Cross multiply
    710,906,059.38x = 981,053,911.14 × 397,640,272.52
  4. Step 4: Simplify right side
    710,906,059.38x = 390,106,544,582,521,408
  5. Step 5: Solve for x
    x = 390,106,544,582,521,408/710,906,059.38
  6. Step 6: Final answer
    x = 548,745,561.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.