Home / 388,449,729.45-536,061,202.43-221,186,126.61

Finding the Fourth Proportional to 388,449,729.45, 536,061,202.43 and 221,186,126.61

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Solution

The fourth proportional to 388,449,729.45, 536,061,202.43 and 221,186,126.61 is: 305,237,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,449,729.45 : 536,061,202.43 = 221,186,126.61 : x
  2. Step 2: Convert to fraction form
    388,449,729.45/536,061,202.43 = 221,186,126.61/x
  3. Step 3: Cross multiply
    388,449,729.45x = 536,061,202.43 × 221,186,126.61
  4. Step 4: Simplify right side
    388,449,729.45x = 118,569,300,990,284,896
  5. Step 5: Solve for x
    x = 118,569,300,990,284,896/388,449,729.45
  6. Step 6: Final answer
    x = 305,237,182.58

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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.