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Finding the Fourth Proportional to 2,757.50, 4,136.28 and 705.50

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Solution

The fourth proportional to 2,757.50, 4,136.28 and 705.50 is: 1,058.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.50 : 4,136.28 = 705.50 : x
  2. Step 2: Convert to fraction form
    2,757.50/4,136.28 = 705.50/x
  3. Step 3: Cross multiply
    2,757.50x = 4,136.28 × 705.50
  4. Step 4: Simplify right side
    2,757.50x = 2,918,145.54
  5. Step 5: Solve for x
    x = 2,918,145.54/2,757.50
  6. Step 6: Final answer
    x = 1,058.26

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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.