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Finding the Fourth Proportional to 999.86, 1,379.39 and 606.65

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Solution

The fourth proportional to 999.86, 1,379.39 and 606.65 is: 836.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.86 : 1,379.39 = 606.65 : x
  2. Step 2: Convert to fraction form
    999.86/1,379.39 = 606.65/x
  3. Step 3: Cross multiply
    999.86x = 1,379.39 × 606.65
  4. Step 4: Simplify right side
    999.86x = 836,797.01
  5. Step 5: Solve for x
    x = 836,797.01/999.86
  6. Step 6: Final answer
    x = 836.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.