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Finding the Fourth Proportional to 999.96, 1,379.16 and 902.76

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Solution

The fourth proportional to 999.96, 1,379.16 and 902.76 is: 1,245.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.96 : 1,379.16 = 902.76 : x
  2. Step 2: Convert to fraction form
    999.96/1,379.16 = 902.76/x
  3. Step 3: Cross multiply
    999.96x = 1,379.16 × 902.76
  4. Step 4: Simplify right side
    999.96x = 1,245,050.48
  5. Step 5: Solve for x
    x = 1,245,050.48/999.96
  6. Step 6: Final answer
    x = 1,245.10

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Why These Related Problems?

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