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Finding the Fourth Proportional to 1,814.91, 2,722.47 and 890.91

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Solution

The fourth proportional to 1,814.91, 2,722.47 and 890.91 is: 1,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.91 : 2,722.47 = 890.91 : x
  2. Step 2: Convert to fraction form
    1,814.91/2,722.47 = 890.91/x
  3. Step 3: Cross multiply
    1,814.91x = 2,722.47 × 890.91
  4. Step 4: Simplify right side
    1,814.91x = 2,425,475.75
  5. Step 5: Solve for x
    x = 2,425,475.75/1,814.91
  6. Step 6: Final answer
    x = 1,336.42

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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.