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Finding the Fourth Proportional to 1,624.38, 2,438.73 and 855.42

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Solution

The fourth proportional to 1,624.38, 2,438.73 and 855.42 is: 1,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,624.38 : 2,438.73 = 855.42 : x
  2. Step 2: Convert to fraction form
    1,624.38/2,438.73 = 855.42/x
  3. Step 3: Cross multiply
    1,624.38x = 2,438.73 × 855.42
  4. Step 4: Simplify right side
    1,624.38x = 2,086,138.42
  5. Step 5: Solve for x
    x = 2,086,138.42/1,624.38
  6. Step 6: Final answer
    x = 1,284.27

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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.