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Finding the Fourth Proportional to 1,205.23, 1,808.03 and 383.42

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Solution

The fourth proportional to 1,205.23, 1,808.03 and 383.42 is: 575.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.23 : 1,808.03 = 383.42 : x
  2. Step 2: Convert to fraction form
    1,205.23/1,808.03 = 383.42/x
  3. Step 3: Cross multiply
    1,205.23x = 1,808.03 × 383.42
  4. Step 4: Simplify right side
    1,205.23x = 693,234.86
  5. Step 5: Solve for x
    x = 693,234.86/1,205.23
  6. Step 6: Final answer
    x = 575.19

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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.