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Finding the Fourth Proportional to 674.21, 928.29 and 612.69

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Solution

The fourth proportional to 674.21, 928.29 and 612.69 is: 843.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.21 : 928.29 = 612.69 : x
  2. Step 2: Convert to fraction form
    674.21/928.29 = 612.69/x
  3. Step 3: Cross multiply
    674.21x = 928.29 × 612.69
  4. Step 4: Simplify right side
    674.21x = 568,754.00
  5. Step 5: Solve for x
    x = 568,754.00/674.21
  6. Step 6: Final answer
    x = 843.59

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1.5x scale

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.