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Finding the Fourth Proportional to 276,645.20, 415,356.60 and 171,669.20

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Solution

The fourth proportional to 276,645.20, 415,356.60 and 171,669.20 is: 257,745.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,645.20 : 415,356.60 = 171,669.20 : x
  2. Step 2: Convert to fraction form
    276,645.20/415,356.60 = 171,669.20/x
  3. Step 3: Cross multiply
    276,645.20x = 415,356.60 × 171,669.20
  4. Step 4: Simplify right side
    276,645.20x = 71,303,935,236.72
  5. Step 5: Solve for x
    x = 71,303,935,236.72/276,645.20
  6. Step 6: Final answer
    x = 257,745.07

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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.