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Finding the Fourth Proportional to 1,702.54, 2,553.99 and 1,272.43

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Solution

The fourth proportional to 1,702.54, 2,553.99 and 1,272.43 is: 1,908.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,702.54 : 2,553.99 = 1,272.43 : x
  2. Step 2: Convert to fraction form
    1,702.54/2,553.99 = 1,272.43/x
  3. Step 3: Cross multiply
    1,702.54x = 2,553.99 × 1,272.43
  4. Step 4: Simplify right side
    1,702.54x = 3,249,773.50
  5. Step 5: Solve for x
    x = 3,249,773.50/1,702.54
  6. Step 6: Final answer
    x = 1,908.78

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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.