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Finding the Fourth Proportional to 4,748.96, 7,123.44 and 1,286.21

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Solution

The fourth proportional to 4,748.96, 7,123.44 and 1,286.21 is: 1,929.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,748.96 : 7,123.44 = 1,286.21 : x
  2. Step 2: Convert to fraction form
    4,748.96/7,123.44 = 1,286.21/x
  3. Step 3: Cross multiply
    4,748.96x = 7,123.44 × 1,286.21
  4. Step 4: Simplify right side
    4,748.96x = 9,162,239.76
  5. Step 5: Solve for x
    x = 9,162,239.76/4,748.96
  6. Step 6: Final answer
    x = 1,929.32

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.