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Finding the Fourth Proportional to 674.80, 942.80 and 674.80

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Solution

The fourth proportional to 674.80, 942.80 and 674.80 is: 942.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.80 : 942.80 = 674.80 : x
  2. Step 2: Convert to fraction form
    674.80/942.80 = 674.80/x
  3. Step 3: Cross multiply
    674.80x = 942.80 × 674.80
  4. Step 4: Simplify right side
    674.80x = 636,201.44
  5. Step 5: Solve for x
    x = 636,201.44/674.80
  6. Step 6: Final answer
    x = 942.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.