Home / 397,729,285.79-548,883,525.69-221,517,359.51

Finding the Fourth Proportional to 397,729,285.79, 548,883,525.69 and 221,517,359.51

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Solution

The fourth proportional to 397,729,285.79, 548,883,525.69 and 221,517,359.51 is: 305,703,486.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,729,285.79 : 548,883,525.69 = 221,517,359.51 : x
  2. Step 2: Convert to fraction form
    397,729,285.79/548,883,525.69 = 221,517,359.51/x
  3. Step 3: Cross multiply
    397,729,285.79x = 548,883,525.69 × 221,517,359.51
  4. Step 4: Simplify right side
    397,729,285.79x = 121,587,229,286,643,648
  5. Step 5: Solve for x
    x = 121,587,229,286,643,648/397,729,285.79
  6. Step 6: Final answer
    x = 305,703,486.35

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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.