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Finding the Fourth Proportional to 777.78, 1,166.22 and 366.66

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Solution

The fourth proportional to 777.78, 1,166.22 and 366.66 is: 549.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.78 : 1,166.22 = 366.66 : x
  2. Step 2: Convert to fraction form
    777.78/1,166.22 = 366.66/x
  3. Step 3: Cross multiply
    777.78x = 1,166.22 × 366.66
  4. Step 4: Simplify right side
    777.78x = 427,606.23
  5. Step 5: Solve for x
    x = 427,606.23/777.78
  6. Step 6: Final answer
    x = 549.78

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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.