Home / 398,947,987.80-598,421,981.70-245,892,979.80

Finding the Fourth Proportional to 398,947,987.80, 598,421,981.70 and 245,892,979.80

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Solution

The fourth proportional to 398,947,987.80, 598,421,981.70 and 245,892,979.80 is: 368,839,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,947,987.80 : 598,421,981.70 = 245,892,979.80 : x
  2. Step 2: Convert to fraction form
    398,947,987.80/598,421,981.70 = 245,892,979.80/x
  3. Step 3: Cross multiply
    398,947,987.80x = 598,421,981.70 × 245,892,979.80
  4. Step 4: Simplify right side
    398,947,987.80x = 147,147,764,258,034,080
  5. Step 5: Solve for x
    x = 147,147,764,258,034,080/398,947,987.80
  6. Step 6: Final answer
    x = 368,839,469.70

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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.