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Finding the Fourth Proportional to 3,108.80, 4,342.60 and 3,108.80

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Solution

The fourth proportional to 3,108.80, 4,342.60 and 3,108.80 is: 4,342.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.80 : 4,342.60 = 3,108.80 : x
  2. Step 2: Convert to fraction form
    3,108.80/4,342.60 = 3,108.80/x
  3. Step 3: Cross multiply
    3,108.80x = 4,342.60 × 3,108.80
  4. Step 4: Simplify right side
    3,108.80x = 13,500,274.88
  5. Step 5: Solve for x
    x = 13,500,274.88/3,108.80
  6. Step 6: Final answer
    x = 4,342.60

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Half scale
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Double scale
Find fourth proportional to 3,109.80, 4,344 and 3,109.80
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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.