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Finding the Fourth Proportional to 1,899.87, 2,851.97 and 1,275.63

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Solution

The fourth proportional to 1,899.87, 2,851.97 and 1,275.63 is: 1,914.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.87 : 2,851.97 = 1,275.63 : x
  2. Step 2: Convert to fraction form
    1,899.87/2,851.97 = 1,275.63/x
  3. Step 3: Cross multiply
    1,899.87x = 2,851.97 × 1,275.63
  4. Step 4: Simplify right side
    1,899.87x = 3,638,058.49
  5. Step 5: Solve for x
    x = 3,638,058.49/1,899.87
  6. Step 6: Final answer
    x = 1,914.90

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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.