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Finding the Fourth Proportional to 2,630.69, 3,946.07 and 656.31

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Solution

The fourth proportional to 2,630.69, 3,946.07 and 656.31 is: 984.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.69 : 3,946.07 = 656.31 : x
  2. Step 2: Convert to fraction form
    2,630.69/3,946.07 = 656.31/x
  3. Step 3: Cross multiply
    2,630.69x = 3,946.07 × 656.31
  4. Step 4: Simplify right side
    2,630.69x = 2,589,845.20
  5. Step 5: Solve for x
    x = 2,589,845.20/2,630.69
  6. Step 6: Final answer
    x = 984.47

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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.