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Finding the Fourth Proportional to 1,784.56, 2,686.71 and 1,396.64

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Solution

The fourth proportional to 1,784.56, 2,686.71 and 1,396.64 is: 2,102.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.56 : 2,686.71 = 1,396.64 : x
  2. Step 2: Convert to fraction form
    1,784.56/2,686.71 = 1,396.64/x
  3. Step 3: Cross multiply
    1,784.56x = 2,686.71 × 1,396.64
  4. Step 4: Simplify right side
    1,784.56x = 3,752,366.65
  5. Step 5: Solve for x
    x = 3,752,366.65/1,784.56
  6. Step 6: Final answer
    x = 2,102.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.