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Finding the Fourth Proportional to 388,571.45, 582,013.51 and 188,471.28

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Solution

The fourth proportional to 388,571.45, 582,013.51 and 188,471.28 is: 282,297.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,571.45 : 582,013.51 = 188,471.28 : x
  2. Step 2: Convert to fraction form
    388,571.45/582,013.51 = 188,471.28/x
  3. Step 3: Cross multiply
    388,571.45x = 582,013.51 × 188,471.28
  4. Step 4: Simplify right side
    388,571.45x = 109,692,831,206.99
  5. Step 5: Solve for x
    x = 109,692,831,206.99/388,571.45
  6. Step 6: Final answer
    x = 282,297.71

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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.