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Finding the Fourth Proportional to 4,917.28, 7,323.20 and 4,889.20

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Solution

The fourth proportional to 4,917.28, 7,323.20 and 4,889.20 is: 7,281.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,917.28 : 7,323.20 = 4,889.20 : x
  2. Step 2: Convert to fraction form
    4,917.28/7,323.20 = 4,889.20/x
  3. Step 3: Cross multiply
    4,917.28x = 7,323.20 × 4,889.20
  4. Step 4: Simplify right side
    4,917.28x = 35,804,589.44
  5. Step 5: Solve for x
    x = 35,804,589.44/4,917.28
  6. Step 6: Final answer
    x = 7,281.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.