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Finding the Fourth Proportional to 881.75, 1,313.31 and 835.49

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Solution

The fourth proportional to 881.75, 1,313.31 and 835.49 is: 1,244.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.75 : 1,313.31 = 835.49 : x
  2. Step 2: Convert to fraction form
    881.75/1,313.31 = 835.49/x
  3. Step 3: Cross multiply
    881.75x = 1,313.31 × 835.49
  4. Step 4: Simplify right side
    881.75x = 1,097,257.37
  5. Step 5: Solve for x
    x = 1,097,257.37/881.75
  6. Step 6: Final answer
    x = 1,244.41

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1.5x scale

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.