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Finding the Fourth Proportional to 2,083.68, 3,136.80 and 1,872

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Solution

The fourth proportional to 2,083.68, 3,136.80 and 1,872 is: 2,818.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,083.68 : 3,136.80 = 1,872 : x
  2. Step 2: Convert to fraction form
    2,083.68/3,136.80 = 1,872/x
  3. Step 3: Cross multiply
    2,083.68x = 3,136.80 × 1,872
  4. Step 4: Simplify right side
    2,083.68x = 5,872,089.60
  5. Step 5: Solve for x
    x = 5,872,089.60/2,083.68
  6. Step 6: Final answer
    x = 2,818.13

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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.