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Finding the Fourth Proportional to 835.94, 1,254.11 and 258.81

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Solution

The fourth proportional to 835.94, 1,254.11 and 258.81 is: 388.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.94 : 1,254.11 = 258.81 : x
  2. Step 2: Convert to fraction form
    835.94/1,254.11 = 258.81/x
  3. Step 3: Cross multiply
    835.94x = 1,254.11 × 258.81
  4. Step 4: Simplify right side
    835.94x = 324,576.21
  5. Step 5: Solve for x
    x = 324,576.21/835.94
  6. Step 6: Final answer
    x = 388.28

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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.