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Finding the Fourth Proportional to 835.12, 1,255.11 and 402.58

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Solution

The fourth proportional to 835.12, 1,255.11 and 402.58 is: 605.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.12 : 1,255.11 = 402.58 : x
  2. Step 2: Convert to fraction form
    835.12/1,255.11 = 402.58/x
  3. Step 3: Cross multiply
    835.12x = 1,255.11 × 402.58
  4. Step 4: Simplify right side
    835.12x = 505,282.18
  5. Step 5: Solve for x
    x = 505,282.18/835.12
  6. Step 6: Final answer
    x = 605.04

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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.