Home / 721,743,243.28-996,006,636.84-391,718,382.28

Finding the Fourth Proportional to 721,743,243.28, 996,006,636.84 and 391,718,382.28

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Solution

The fourth proportional to 721,743,243.28, 996,006,636.84 and 391,718,382.28 is: 540,571,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,743,243.28 : 996,006,636.84 = 391,718,382.28 : x
  2. Step 2: Convert to fraction form
    721,743,243.28/996,006,636.84 = 391,718,382.28/x
  3. Step 3: Cross multiply
    721,743,243.28x = 996,006,636.84 × 391,718,382.28
  4. Step 4: Simplify right side
    721,743,243.28x = 390,154,108,523,108,224
  5. Step 5: Solve for x
    x = 390,154,108,523,108,224/721,743,243.28
  6. Step 6: Final answer
    x = 540,571,889.18

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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.