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Finding the Fourth Proportional to 2,765, 4,147.50 and 713

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Solution

The fourth proportional to 2,765, 4,147.50 and 713 is: 1,069.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765 : 4,147.50 = 713 : x
  2. Step 2: Convert to fraction form
    2,765/4,147.50 = 713/x
  3. Step 3: Cross multiply
    2,765x = 4,147.50 × 713
  4. Step 4: Simplify right side
    2,765x = 2,957,167.50
  5. Step 5: Solve for x
    x = 2,957,167.50/2,765
  6. Step 6: Final answer
    x = 1,069.50

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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.