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Finding the Fourth Proportional to 7,289.80, 10,908.78 and 4,196.68

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Solution

The fourth proportional to 7,289.80, 10,908.78 and 4,196.68 is: 6,280.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,289.80 : 10,908.78 = 4,196.68 : x
  2. Step 2: Convert to fraction form
    7,289.80/10,908.78 = 4,196.68/x
  3. Step 3: Cross multiply
    7,289.80x = 10,908.78 × 4,196.68
  4. Step 4: Simplify right side
    7,289.80x = 45,780,658.85
  5. Step 5: Solve for x
    x = 45,780,658.85/7,289.80
  6. Step 6: Final answer
    x = 6,280.10

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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.