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Finding the Fourth Proportional to 1,021.53, 1,406.52 and 896.43

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Solution

The fourth proportional to 1,021.53, 1,406.52 and 896.43 is: 1,234.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.53 : 1,406.52 = 896.43 : x
  2. Step 2: Convert to fraction form
    1,021.53/1,406.52 = 896.43/x
  3. Step 3: Cross multiply
    1,021.53x = 1,406.52 × 896.43
  4. Step 4: Simplify right side
    1,021.53x = 1,260,846.72
  5. Step 5: Solve for x
    x = 1,260,846.72/1,021.53
  6. Step 6: Final answer
    x = 1,234.27

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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.