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Finding the Fourth Proportional to 835.06, 1,258.93 and 790.42

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Solution

The fourth proportional to 835.06, 1,258.93 and 790.42 is: 1,191.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.06 : 1,258.93 = 790.42 : x
  2. Step 2: Convert to fraction form
    835.06/1,258.93 = 790.42/x
  3. Step 3: Cross multiply
    835.06x = 1,258.93 × 790.42
  4. Step 4: Simplify right side
    835.06x = 995,083.45
  5. Step 5: Solve for x
    x = 995,083.45/835.06
  6. Step 6: Final answer
    x = 1,191.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.