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Finding the Fourth Proportional to 1,306.83, 1,958.09 and 818.67

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Solution

The fourth proportional to 1,306.83, 1,958.09 and 818.67 is: 1,226.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.83 : 1,958.09 = 818.67 : x
  2. Step 2: Convert to fraction form
    1,306.83/1,958.09 = 818.67/x
  3. Step 3: Cross multiply
    1,306.83x = 1,958.09 × 818.67
  4. Step 4: Simplify right side
    1,306.83x = 1,603,025.45
  5. Step 5: Solve for x
    x = 1,603,025.45/1,306.83
  6. Step 6: Final answer
    x = 1,226.65

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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.