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Finding the Fourth Proportional to 7,290.78, 10,940.64 and 2,908.62

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Solution

The fourth proportional to 7,290.78, 10,940.64 and 2,908.62 is: 4,364.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,290.78 : 10,940.64 = 2,908.62 : x
  2. Step 2: Convert to fraction form
    7,290.78/10,940.64 = 2,908.62/x
  3. Step 3: Cross multiply
    7,290.78x = 10,940.64 × 2,908.62
  4. Step 4: Simplify right side
    7,290.78x = 31,822,164.32
  5. Step 5: Solve for x
    x = 31,822,164.32/7,290.78
  6. Step 6: Final answer
    x = 4,364.71

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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.