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Finding the Fourth Proportional to 1,946.22, 2,919.65 and 776.22

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Solution

The fourth proportional to 1,946.22, 2,919.65 and 776.22 is: 1,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.22 : 2,919.65 = 776.22 : x
  2. Step 2: Convert to fraction form
    1,946.22/2,919.65 = 776.22/x
  3. Step 3: Cross multiply
    1,946.22x = 2,919.65 × 776.22
  4. Step 4: Simplify right side
    1,946.22x = 2,266,286.84
  5. Step 5: Solve for x
    x = 2,266,286.84/1,946.22
  6. Step 6: Final answer
    x = 1,164.46

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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.