Home / 729,071,970.57-1,006,121,859.80-394,544,409.21

Finding the Fourth Proportional to 729,071,970.57, 1,006,121,859.80 and 394,544,409.21

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Solution

The fourth proportional to 729,071,970.57, 1,006,121,859.80 and 394,544,409.21 is: 544,472,659.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,071,970.57 : 1,006,121,859.80 = 394,544,409.21 : x
  2. Step 2: Convert to fraction form
    729,071,970.57/1,006,121,859.80 = 394,544,409.21/x
  3. Step 3: Cross multiply
    729,071,970.57x = 1,006,121,859.80 × 394,544,409.21
  4. Step 4: Simplify right side
    729,071,970.57x = 396,959,754,766,084,672
  5. Step 5: Solve for x
    x = 396,959,754,766,084,672/729,071,970.57
  6. Step 6: Final answer
    x = 544,472,659.48

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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.