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Finding the Fourth Proportional to 1,946.40, 2,918.70 and 850.20

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Solution

The fourth proportional to 1,946.40, 2,918.70 and 850.20 is: 1,274.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.40 : 2,918.70 = 850.20 : x
  2. Step 2: Convert to fraction form
    1,946.40/2,918.70 = 850.20/x
  3. Step 3: Cross multiply
    1,946.40x = 2,918.70 × 850.20
  4. Step 4: Simplify right side
    1,946.40x = 2,481,478.74
  5. Step 5: Solve for x
    x = 2,481,478.74/1,946.40
  6. Step 6: Final answer
    x = 1,274.91

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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.