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Finding the Fourth Proportional to 1,900.71, 2,851.02 and 860.49

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Solution

The fourth proportional to 1,900.71, 2,851.02 and 860.49 is: 1,290.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.71 : 2,851.02 = 860.49 : x
  2. Step 2: Convert to fraction form
    1,900.71/2,851.02 = 860.49/x
  3. Step 3: Cross multiply
    1,900.71x = 2,851.02 × 860.49
  4. Step 4: Simplify right side
    1,900.71x = 2,453,274.20
  5. Step 5: Solve for x
    x = 2,453,274.20/1,900.71
  6. Step 6: Final answer
    x = 1,290.71

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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.