Home / 721,743,231.78-996,006,620.97-391,718,370.78

Finding the Fourth Proportional to 721,743,231.78, 996,006,620.97 and 391,718,370.78

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Solution

The fourth proportional to 721,743,231.78, 996,006,620.97 and 391,718,370.78 is: 540,571,873.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,743,231.78 : 996,006,620.97 = 391,718,370.78 : x
  2. Step 2: Convert to fraction form
    721,743,231.78/996,006,620.97 = 391,718,370.78/x
  3. Step 3: Cross multiply
    721,743,231.78x = 996,006,620.97 × 391,718,370.78
  4. Step 4: Simplify right side
    721,743,231.78x = 390,154,090,852,461,376
  5. Step 5: Solve for x
    x = 390,154,090,852,461,376/721,743,231.78
  6. Step 6: Final answer
    x = 540,571,873.31

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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.