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Finding the Fourth Proportional to 1,205.37, 1,808.07 and 339.69

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Solution

The fourth proportional to 1,205.37, 1,808.07 and 339.69 is: 509.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.37 : 1,808.07 = 339.69 : x
  2. Step 2: Convert to fraction form
    1,205.37/1,808.07 = 339.69/x
  3. Step 3: Cross multiply
    1,205.37x = 1,808.07 × 339.69
  4. Step 4: Simplify right side
    1,205.37x = 614,183.30
  5. Step 5: Solve for x
    x = 614,183.30/1,205.37
  6. Step 6: Final answer
    x = 509.54

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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.