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Finding the Fourth Proportional to 1,964.26, 2,946.78 and 665.68

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Solution

The fourth proportional to 1,964.26, 2,946.78 and 665.68 is: 998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.26 : 2,946.78 = 665.68 : x
  2. Step 2: Convert to fraction form
    1,964.26/2,946.78 = 665.68/x
  3. Step 3: Cross multiply
    1,964.26x = 2,946.78 × 665.68
  4. Step 4: Simplify right side
    1,964.26x = 1,961,612.51
  5. Step 5: Solve for x
    x = 1,961,612.51/1,964.26
  6. Step 6: Final answer
    x = 998.65

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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.