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Finding the Fourth Proportional to 388,571.16, 536,255.64 and 216,500.43

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Solution

The fourth proportional to 388,571.16, 536,255.64 and 216,500.43 is: 298,785.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,571.16 : 536,255.64 = 216,500.43 : x
  2. Step 2: Convert to fraction form
    388,571.16/536,255.64 = 216,500.43/x
  3. Step 3: Cross multiply
    388,571.16x = 536,255.64 × 216,500.43
  4. Step 4: Simplify right side
    388,571.16x = 116,099,576,649.93
  5. Step 5: Solve for x
    x = 116,099,576,649.93/388,571.16
  6. Step 6: Final answer
    x = 298,785.88

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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.