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Finding the Fourth Proportional to 4,905.78, 6,768.36 and 3,015.42

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Solution

The fourth proportional to 4,905.78, 6,768.36 and 3,015.42 is: 4,160.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,905.78 : 6,768.36 = 3,015.42 : x
  2. Step 2: Convert to fraction form
    4,905.78/6,768.36 = 3,015.42/x
  3. Step 3: Cross multiply
    4,905.78x = 6,768.36 × 3,015.42
  4. Step 4: Simplify right side
    4,905.78x = 20,409,448.11
  5. Step 5: Solve for x
    x = 20,409,448.11/4,905.78
  6. Step 6: Final answer
    x = 4,160.29

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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.