Home / 425,642,005.40-638,211,065.70-221,568,661.40

Finding the Fourth Proportional to 425,642,005.40, 638,211,065.70 and 221,568,661.40

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Solution

The fourth proportional to 425,642,005.40, 638,211,065.70 and 221,568,661.40 is: 332,221,843.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,642,005.40 : 638,211,065.70 = 221,568,661.40 : x
  2. Step 2: Convert to fraction form
    425,642,005.40/638,211,065.70 = 221,568,661.40/x
  3. Step 3: Cross multiply
    425,642,005.40x = 638,211,065.70 × 221,568,661.40
  4. Step 4: Simplify right side
    425,642,005.40x = 141,407,571,517,816,464
  5. Step 5: Solve for x
    x = 141,407,571,517,816,464/425,642,005.40
  6. Step 6: Final answer
    x = 332,221,843.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.