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Finding the Fourth Proportional to 1,205.55, 1,808.46 and 383.85

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Solution

The fourth proportional to 1,205.55, 1,808.46 and 383.85 is: 575.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.55 : 1,808.46 = 383.85 : x
  2. Step 2: Convert to fraction form
    1,205.55/1,808.46 = 383.85/x
  3. Step 3: Cross multiply
    1,205.55x = 1,808.46 × 383.85
  4. Step 4: Simplify right side
    1,205.55x = 694,177.37
  5. Step 5: Solve for x
    x = 694,177.37/1,205.55
  6. Step 6: Final answer
    x = 575.82

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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.