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Finding the Fourth Proportional to 303,917.20, 455,219.70 and 251,429.20

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Solution

The fourth proportional to 303,917.20, 455,219.70 and 251,429.20 is: 376,601.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,917.20 : 455,219.70 = 251,429.20 : x
  2. Step 2: Convert to fraction form
    303,917.20/455,219.70 = 251,429.20/x
  3. Step 3: Cross multiply
    303,917.20x = 455,219.70 × 251,429.20
  4. Step 4: Simplify right side
    303,917.20x = 114,455,524,995.24
  5. Step 5: Solve for x
    x = 114,455,524,995.24/303,917.20
  6. Step 6: Final answer
    x = 376,601.01

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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.