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Finding the Fourth Proportional to 319,359.80, 440,896.56 and 212,076.56

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Solution

The fourth proportional to 319,359.80, 440,896.56 and 212,076.56 is: 292,785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,359.80 : 440,896.56 = 212,076.56 : x
  2. Step 2: Convert to fraction form
    319,359.80/440,896.56 = 212,076.56/x
  3. Step 3: Cross multiply
    319,359.80x = 440,896.56 × 212,076.56
  4. Step 4: Simplify right side
    319,359.80x = 93,503,825,760.63
  5. Step 5: Solve for x
    x = 93,503,825,760.63/319,359.80
  6. Step 6: Final answer
    x = 292,785.21

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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.