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Finding the Fourth Proportional to 1,898.91, 2,847.65 and 911.43

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Solution

The fourth proportional to 1,898.91, 2,847.65 and 911.43 is: 1,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.91 : 2,847.65 = 911.43 : x
  2. Step 2: Convert to fraction form
    1,898.91/2,847.65 = 911.43/x
  3. Step 3: Cross multiply
    1,898.91x = 2,847.65 × 911.43
  4. Step 4: Simplify right side
    1,898.91x = 2,595,429.08
  5. Step 5: Solve for x
    x = 2,595,429.08/1,898.91
  6. Step 6: Final answer
    x = 1,366.80

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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.