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Finding the Fourth Proportional to 1,889.90, 2,607.88 and 1,103.79

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Solution

The fourth proportional to 1,889.90, 2,607.88 and 1,103.79 is: 1,523.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.90 : 2,607.88 = 1,103.79 : x
  2. Step 2: Convert to fraction form
    1,889.90/2,607.88 = 1,103.79/x
  3. Step 3: Cross multiply
    1,889.90x = 2,607.88 × 1,103.79
  4. Step 4: Simplify right side
    1,889.90x = 2,878,551.87
  5. Step 5: Solve for x
    x = 2,878,551.87/1,889.90
  6. Step 6: Final answer
    x = 1,523.12

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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.