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Finding the Fourth Proportional to 993.53, 1,490.97 and 746.21

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Solution

The fourth proportional to 993.53, 1,490.97 and 746.21 is: 1,119.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.53 : 1,490.97 = 746.21 : x
  2. Step 2: Convert to fraction form
    993.53/1,490.97 = 746.21/x
  3. Step 3: Cross multiply
    993.53x = 1,490.97 × 746.21
  4. Step 4: Simplify right side
    993.53x = 1,112,576.72
  5. Step 5: Solve for x
    x = 1,112,576.72/993.53
  6. Step 6: Final answer
    x = 1,119.82

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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.