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Finding the Fourth Proportional to 389,915.02, 538,084.41 and 211,067.02

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Solution

The fourth proportional to 389,915.02, 538,084.41 and 211,067.02 is: 291,273.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,915.02 : 538,084.41 = 211,067.02 : x
  2. Step 2: Convert to fraction form
    389,915.02/538,084.41 = 211,067.02/x
  3. Step 3: Cross multiply
    389,915.02x = 538,084.41 × 211,067.02
  4. Step 4: Simplify right side
    389,915.02x = 113,571,872,927.16
  5. Step 5: Solve for x
    x = 113,571,872,927.16/389,915.02
  6. Step 6: Final answer
    x = 291,273.40

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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.