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Finding the Fourth Proportional to 896.90, 1,339.31 and 845.64

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Solution

The fourth proportional to 896.90, 1,339.31 and 845.64 is: 1,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.90 : 1,339.31 = 845.64 : x
  2. Step 2: Convert to fraction form
    896.90/1,339.31 = 845.64/x
  3. Step 3: Cross multiply
    896.90x = 1,339.31 × 845.64
  4. Step 4: Simplify right side
    896.90x = 1,132,573.84
  5. Step 5: Solve for x
    x = 1,132,573.84/896.90
  6. Step 6: Final answer
    x = 1,262.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.