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Finding the Fourth Proportional to 1,787.36, 2,681.28 and 1,679.36

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Solution

The fourth proportional to 1,787.36, 2,681.28 and 1,679.36 is: 2,519.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.36 : 2,681.28 = 1,679.36 : x
  2. Step 2: Convert to fraction form
    1,787.36/2,681.28 = 1,679.36/x
  3. Step 3: Cross multiply
    1,787.36x = 2,681.28 × 1,679.36
  4. Step 4: Simplify right side
    1,787.36x = 4,502,834.38
  5. Step 5: Solve for x
    x = 4,502,834.38/1,787.36
  6. Step 6: Final answer
    x = 2,519.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.