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Finding the Fourth Proportional to 4,976.68, 7,480.51 and 3,139.60

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Solution

The fourth proportional to 4,976.68, 7,480.51 and 3,139.60 is: 4,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,976.68 : 7,480.51 = 3,139.60 : x
  2. Step 2: Convert to fraction form
    4,976.68/7,480.51 = 3,139.60/x
  3. Step 3: Cross multiply
    4,976.68x = 7,480.51 × 3,139.60
  4. Step 4: Simplify right side
    4,976.68x = 23,485,809.20
  5. Step 5: Solve for x
    x = 23,485,809.20/4,976.68
  6. Step 6: Final answer
    x = 4,719.17

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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.