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Finding the Fourth Proportional to 19,200.50, 28,800.75 and 4,608.50

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Solution

The fourth proportional to 19,200.50, 28,800.75 and 4,608.50 is: 6,912.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,200.50 : 28,800.75 = 4,608.50 : x
  2. Step 2: Convert to fraction form
    19,200.50/28,800.75 = 4,608.50/x
  3. Step 3: Cross multiply
    19,200.50x = 28,800.75 × 4,608.50
  4. Step 4: Simplify right side
    19,200.50x = 132,728,256.38
  5. Step 5: Solve for x
    x = 132,728,256.38/19,200.50
  6. Step 6: Final answer
    x = 6,912.75

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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.