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Finding the Fourth Proportional to 993.88, 1,371.63 and 662.32

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Solution

The fourth proportional to 993.88, 1,371.63 and 662.32 is: 914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.88 : 1,371.63 = 662.32 : x
  2. Step 2: Convert to fraction form
    993.88/1,371.63 = 662.32/x
  3. Step 3: Cross multiply
    993.88x = 1,371.63 × 662.32
  4. Step 4: Simplify right side
    993.88x = 908,457.98
  5. Step 5: Solve for x
    x = 908,457.98/993.88
  6. Step 6: Final answer
    x = 914.05

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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.