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Finding the Fourth Proportional to 910.86, 1,367.22 and 666.66

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Solution

The fourth proportional to 910.86, 1,367.22 and 666.66 is: 1,000.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.86 : 1,367.22 = 666.66 : x
  2. Step 2: Convert to fraction form
    910.86/1,367.22 = 666.66/x
  3. Step 3: Cross multiply
    910.86x = 1,367.22 × 666.66
  4. Step 4: Simplify right side
    910.86x = 911,470.89
  5. Step 5: Solve for x
    x = 911,470.89/910.86
  6. Step 6: Final answer
    x = 1,000.67

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.