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Finding the Fourth Proportional to 276,717.55, 415,076.43 and 213,629.77

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Solution

The fourth proportional to 276,717.55, 415,076.43 and 213,629.77 is: 320,444.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,717.55 : 415,076.43 = 213,629.77 : x
  2. Step 2: Convert to fraction form
    276,717.55/415,076.43 = 213,629.77/x
  3. Step 3: Cross multiply
    276,717.55x = 415,076.43 × 213,629.77
  4. Step 4: Simplify right side
    276,717.55x = 88,672,682,273.32
  5. Step 5: Solve for x
    x = 88,672,682,273.32/276,717.55
  6. Step 6: Final answer
    x = 320,444.74

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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.