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Finding the Fourth Proportional to 993.22, 1,489.90 and 376.82

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Solution

The fourth proportional to 993.22, 1,489.90 and 376.82 is: 565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.22 : 1,489.90 = 376.82 : x
  2. Step 2: Convert to fraction form
    993.22/1,489.90 = 376.82/x
  3. Step 3: Cross multiply
    993.22x = 1,489.90 × 376.82
  4. Step 4: Simplify right side
    993.22x = 561,424.12
  5. Step 5: Solve for x
    x = 561,424.12/993.22
  6. Step 6: Final answer
    x = 565.26

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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.