Home / 721,743,232.78-996,006,622.36-391,718,371.78

Finding the Fourth Proportional to 721,743,232.78, 996,006,622.36 and 391,718,371.78

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Solution

The fourth proportional to 721,743,232.78, 996,006,622.36 and 391,718,371.78 is: 540,571,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,743,232.78 : 996,006,622.36 = 391,718,371.78 : x
  2. Step 2: Convert to fraction form
    721,743,232.78/996,006,622.36 = 391,718,371.78/x
  3. Step 3: Cross multiply
    721,743,232.78x = 996,006,622.36 × 391,718,371.78
  4. Step 4: Simplify right side
    721,743,232.78x = 390,154,092,392,956,544
  5. Step 5: Solve for x
    x = 390,154,092,392,956,544/721,743,232.78
  6. Step 6: Final answer
    x = 540,571,874.70

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1.5x scale

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.