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Finding the Fourth Proportional to 680.80, 943.48 and 667.84

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Solution

The fourth proportional to 680.80, 943.48 and 667.84 is: 925.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.80 : 943.48 = 667.84 : x
  2. Step 2: Convert to fraction form
    680.80/943.48 = 667.84/x
  3. Step 3: Cross multiply
    680.80x = 943.48 × 667.84
  4. Step 4: Simplify right side
    680.80x = 630,093.68
  5. Step 5: Solve for x
    x = 630,093.68/680.80
  6. Step 6: Final answer
    x = 925.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.