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Finding the Fourth Proportional to 2,873.52, 3,962.44 and 2,128.92

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Solution

The fourth proportional to 2,873.52, 3,962.44 and 2,128.92 is: 2,935.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,873.52 : 3,962.44 = 2,128.92 : x
  2. Step 2: Convert to fraction form
    2,873.52/3,962.44 = 2,128.92/x
  3. Step 3: Cross multiply
    2,873.52x = 3,962.44 × 2,128.92
  4. Step 4: Simplify right side
    2,873.52x = 8,435,717.76
  5. Step 5: Solve for x
    x = 8,435,717.76/2,873.52
  6. Step 6: Final answer
    x = 2,935.67

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Half scale
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Double scale
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Similar ratio
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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.