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Finding the Fourth Proportional to 2,840.76, 3,915 and 2,053.44

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Solution

The fourth proportional to 2,840.76, 3,915 and 2,053.44 is: 2,829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.76 : 3,915 = 2,053.44 : x
  2. Step 2: Convert to fraction form
    2,840.76/3,915 = 2,053.44/x
  3. Step 3: Cross multiply
    2,840.76x = 3,915 × 2,053.44
  4. Step 4: Simplify right side
    2,840.76x = 8,039,217.60
  5. Step 5: Solve for x
    x = 8,039,217.60/2,840.76
  6. Step 6: Final answer
    x = 2,829.95

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Double scale
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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.