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Finding the Fourth Proportional to 993.74, 1,371.03 and 662.23

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Solution

The fourth proportional to 993.74, 1,371.03 and 662.23 is: 913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.74 : 1,371.03 = 662.23 : x
  2. Step 2: Convert to fraction form
    993.74/1,371.03 = 662.23/x
  3. Step 3: Cross multiply
    993.74x = 1,371.03 × 662.23
  4. Step 4: Simplify right side
    993.74x = 907,930.34
  5. Step 5: Solve for x
    x = 907,930.34/993.74
  6. Step 6: Final answer
    x = 913.65

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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.