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Finding the Fourth Proportional to 1,891.56, 2,612.88 and 1,541.64

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Solution

The fourth proportional to 1,891.56, 2,612.88 and 1,541.64 is: 2,129.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.56 : 2,612.88 = 1,541.64 : x
  2. Step 2: Convert to fraction form
    1,891.56/2,612.88 = 1,541.64/x
  3. Step 3: Cross multiply
    1,891.56x = 2,612.88 × 1,541.64
  4. Step 4: Simplify right side
    1,891.56x = 4,028,120.32
  5. Step 5: Solve for x
    x = 4,028,120.32/1,891.56
  6. Step 6: Final answer
    x = 2,129.52

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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.