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Finding the Fourth Proportional to 1,960, 2,685.23 and 1,886.20

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Solution

The fourth proportional to 1,960, 2,685.23 and 1,886.20 is: 2,584.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960 : 2,685.23 = 1,886.20 : x
  2. Step 2: Convert to fraction form
    1,960/2,685.23 = 1,886.20/x
  3. Step 3: Cross multiply
    1,960x = 2,685.23 × 1,886.20
  4. Step 4: Simplify right side
    1,960x = 5,064,880.83
  5. Step 5: Solve for x
    x = 5,064,880.83/1,960
  6. Step 6: Final answer
    x = 2,584.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.