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Finding the Fourth Proportional to 662.03, 988.20 and 611

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Solution

The fourth proportional to 662.03, 988.20 and 611 is: 912.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.03 : 988.20 = 611 : x
  2. Step 2: Convert to fraction form
    662.03/988.20 = 611/x
  3. Step 3: Cross multiply
    662.03x = 988.20 × 611
  4. Step 4: Simplify right side
    662.03x = 603,790.20
  5. Step 5: Solve for x
    x = 603,790.20/662.03
  6. Step 6: Final answer
    x = 912.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.