Home / 388,530,955.38-536,203,282.77-221,274,288.66

Finding the Fourth Proportional to 388,530,955.38, 536,203,282.77 and 221,274,288.66

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Solution

The fourth proportional to 388,530,955.38, 536,203,282.77 and 221,274,288.66 is: 305,375,925.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,530,955.38 : 536,203,282.77 = 221,274,288.66 : x
  2. Step 2: Convert to fraction form
    388,530,955.38/536,203,282.77 = 221,274,288.66/x
  3. Step 3: Cross multiply
    388,530,955.38x = 536,203,282.77 × 221,274,288.66
  4. Step 4: Simplify right side
    388,530,955.38x = 118,647,999,972,088,576
  5. Step 5: Solve for x
    x = 118,647,999,972,088,576/388,530,955.38
  6. Step 6: Final answer
    x = 305,375,925.21

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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.