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Finding the Fourth Proportional to 835.08, 1,245.01 and 813.78

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Solution

The fourth proportional to 835.08, 1,245.01 and 813.78 is: 1,213.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.08 : 1,245.01 = 813.78 : x
  2. Step 2: Convert to fraction form
    835.08/1,245.01 = 813.78/x
  3. Step 3: Cross multiply
    835.08x = 1,245.01 × 813.78
  4. Step 4: Simplify right side
    835.08x = 1,013,165.26
  5. Step 5: Solve for x
    x = 1,013,165.26/835.08
  6. Step 6: Final answer
    x = 1,213.26

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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.