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Finding the Fourth Proportional to 680.84, 943.50 and 667.88

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Solution

The fourth proportional to 680.84, 943.50 and 667.88 is: 925.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.84 : 943.50 = 667.88 : x
  2. Step 2: Convert to fraction form
    680.84/943.50 = 667.88/x
  3. Step 3: Cross multiply
    680.84x = 943.50 × 667.88
  4. Step 4: Simplify right side
    680.84x = 630,144.78
  5. Step 5: Solve for x
    x = 630,144.78/680.84
  6. Step 6: Final answer
    x = 925.54

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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.