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Finding the Fourth Proportional to 777.85, 1,167.27 and 367.45

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Solution

The fourth proportional to 777.85, 1,167.27 and 367.45 is: 551.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.85 : 1,167.27 = 367.45 : x
  2. Step 2: Convert to fraction form
    777.85/1,167.27 = 367.45/x
  3. Step 3: Cross multiply
    777.85x = 1,167.27 × 367.45
  4. Step 4: Simplify right side
    777.85x = 428,913.36
  5. Step 5: Solve for x
    x = 428,913.36/777.85
  6. Step 6: Final answer
    x = 551.41

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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.