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Finding the Fourth Proportional to 1,891.80, 2,610.70 and 1,052.60

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Solution

The fourth proportional to 1,891.80, 2,610.70 and 1,052.60 is: 1,452.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.80 : 2,610.70 = 1,052.60 : x
  2. Step 2: Convert to fraction form
    1,891.80/2,610.70 = 1,052.60/x
  3. Step 3: Cross multiply
    1,891.80x = 2,610.70 × 1,052.60
  4. Step 4: Simplify right side
    1,891.80x = 2,748,022.82
  5. Step 5: Solve for x
    x = 2,748,022.82/1,891.80
  6. Step 6: Final answer
    x = 1,452.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.