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Finding the Fourth Proportional to 1,033.43, 1,421.90 and 893.09

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Solution

The fourth proportional to 1,033.43, 1,421.90 and 893.09 is: 1,228.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.43 : 1,421.90 = 893.09 : x
  2. Step 2: Convert to fraction form
    1,033.43/1,421.90 = 893.09/x
  3. Step 3: Cross multiply
    1,033.43x = 1,421.90 × 893.09
  4. Step 4: Simplify right side
    1,033.43x = 1,269,883.76
  5. Step 5: Solve for x
    x = 1,269,883.76/1,033.43
  6. Step 6: Final answer
    x = 1,228.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.