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Finding the Fourth Proportional to 835.56, 1,248.94 and 818.28

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Solution

The fourth proportional to 835.56, 1,248.94 and 818.28 is: 1,223.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.56 : 1,248.94 = 818.28 : x
  2. Step 2: Convert to fraction form
    835.56/1,248.94 = 818.28/x
  3. Step 3: Cross multiply
    835.56x = 1,248.94 × 818.28
  4. Step 4: Simplify right side
    835.56x = 1,021,982.62
  5. Step 5: Solve for x
    x = 1,021,982.62/835.56
  6. Step 6: Final answer
    x = 1,223.11

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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.