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Finding the Fourth Proportional to 999.46, 1,379.73 and 704.98

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Solution

The fourth proportional to 999.46, 1,379.73 and 704.98 is: 973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.46 : 1,379.73 = 704.98 : x
  2. Step 2: Convert to fraction form
    999.46/1,379.73 = 704.98/x
  3. Step 3: Cross multiply
    999.46x = 1,379.73 × 704.98
  4. Step 4: Simplify right side
    999.46x = 972,682.06
  5. Step 5: Solve for x
    x = 972,682.06/999.46
  6. Step 6: Final answer
    x = 973.21

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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.