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Finding the Fourth Proportional to 818.90, 1,228.37 and 241.77

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Solution

The fourth proportional to 818.90, 1,228.37 and 241.77 is: 362.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.90 : 1,228.37 = 241.77 : x
  2. Step 2: Convert to fraction form
    818.90/1,228.37 = 241.77/x
  3. Step 3: Cross multiply
    818.90x = 1,228.37 × 241.77
  4. Step 4: Simplify right side
    818.90x = 296,983.01
  5. Step 5: Solve for x
    x = 296,983.01/818.90
  6. Step 6: Final answer
    x = 362.66

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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.