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Finding the Fourth Proportional to 391,236.88, 539,907.24 and 212,388.88

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Solution

The fourth proportional to 391,236.88, 539,907.24 and 212,388.88 is: 293,096.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,236.88 : 539,907.24 = 212,388.88 : x
  2. Step 2: Convert to fraction form
    391,236.88/539,907.24 = 212,388.88/x
  3. Step 3: Cross multiply
    391,236.88x = 539,907.24 × 212,388.88
  4. Step 4: Simplify right side
    391,236.88x = 114,670,294,007.49
  5. Step 5: Solve for x
    x = 114,670,294,007.49/391,236.88
  6. Step 6: Final answer
    x = 293,096.84

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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.