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Finding the Fourth Proportional to 654.80, 988.03 and 629.49

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Solution

The fourth proportional to 654.80, 988.03 and 629.49 is: 949.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.80 : 988.03 = 629.49 : x
  2. Step 2: Convert to fraction form
    654.80/988.03 = 629.49/x
  3. Step 3: Cross multiply
    654.80x = 988.03 × 629.49
  4. Step 4: Simplify right side
    654.80x = 621,955.00
  5. Step 5: Solve for x
    x = 621,955.00/654.80
  6. Step 6: Final answer
    x = 949.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.