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Finding the Fourth Proportional to 679.55, 936.90 and 670.37

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Solution

The fourth proportional to 679.55, 936.90 and 670.37 is: 924.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.55 : 936.90 = 670.37 : x
  2. Step 2: Convert to fraction form
    679.55/936.90 = 670.37/x
  3. Step 3: Cross multiply
    679.55x = 936.90 × 670.37
  4. Step 4: Simplify right side
    679.55x = 628,064.97
  5. Step 5: Solve for x
    x = 628,064.97/679.55
  6. Step 6: Final answer
    x = 924.24

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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.