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Finding the Fourth Proportional to 2,619.93, 3,930.74 and 976.71

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Solution

The fourth proportional to 2,619.93, 3,930.74 and 976.71 is: 1,465.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.93 : 3,930.74 = 976.71 : x
  2. Step 2: Convert to fraction form
    2,619.93/3,930.74 = 976.71/x
  3. Step 3: Cross multiply
    2,619.93x = 3,930.74 × 976.71
  4. Step 4: Simplify right side
    2,619.93x = 3,839,193.07
  5. Step 5: Solve for x
    x = 3,839,193.07/2,619.93
  6. Step 6: Final answer
    x = 1,465.38

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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.