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Finding the Fourth Proportional to 1,967.67, 2,951.78 and 668.79

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Solution

The fourth proportional to 1,967.67, 2,951.78 and 668.79 is: 1,003.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,967.67 : 2,951.78 = 668.79 : x
  2. Step 2: Convert to fraction form
    1,967.67/2,951.78 = 668.79/x
  3. Step 3: Cross multiply
    1,967.67x = 2,951.78 × 668.79
  4. Step 4: Simplify right side
    1,967.67x = 1,974,117.60
  5. Step 5: Solve for x
    x = 1,974,117.60/1,967.67
  6. Step 6: Final answer
    x = 1,003.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.