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Finding the Fourth Proportional to 1,940.68, 2,674.38 and 1,587.88

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Solution

The fourth proportional to 1,940.68, 2,674.38 and 1,587.88 is: 2,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.68 : 2,674.38 = 1,587.88 : x
  2. Step 2: Convert to fraction form
    1,940.68/2,674.38 = 1,587.88/x
  3. Step 3: Cross multiply
    1,940.68x = 2,674.38 × 1,587.88
  4. Step 4: Simplify right side
    1,940.68x = 4,246,594.51
  5. Step 5: Solve for x
    x = 4,246,594.51/1,940.68
  6. Step 6: Final answer
    x = 2,188.20

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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.