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Finding the Fourth Proportional to 6,450.78, 9,679.41 and 4,890.27

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Solution

The fourth proportional to 6,450.78, 9,679.41 and 4,890.27 is: 7,337.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,450.78 : 9,679.41 = 4,890.27 : x
  2. Step 2: Convert to fraction form
    6,450.78/9,679.41 = 4,890.27/x
  3. Step 3: Cross multiply
    6,450.78x = 9,679.41 × 4,890.27
  4. Step 4: Simplify right side
    6,450.78x = 47,334,928.34
  5. Step 5: Solve for x
    x = 47,334,928.34/6,450.78
  6. Step 6: Final answer
    x = 7,337.86

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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.