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Finding the Fourth Proportional to 670.63, 997.44 and 663.34

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Solution

The fourth proportional to 670.63, 997.44 and 663.34 is: 986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.63 : 997.44 = 663.34 : x
  2. Step 2: Convert to fraction form
    670.63/997.44 = 663.34/x
  3. Step 3: Cross multiply
    670.63x = 997.44 × 663.34
  4. Step 4: Simplify right side
    670.63x = 661,640.60
  5. Step 5: Solve for x
    x = 661,640.60/670.63
  6. Step 6: Final answer
    x = 986.60

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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.