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Finding the Fourth Proportional to 2,763.50, 4,145.29 and 711.50

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Solution

The fourth proportional to 2,763.50, 4,145.29 and 711.50 is: 1,067.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.50 : 4,145.29 = 711.50 : x
  2. Step 2: Convert to fraction form
    2,763.50/4,145.29 = 711.50/x
  3. Step 3: Cross multiply
    2,763.50x = 4,145.29 × 711.50
  4. Step 4: Simplify right side
    2,763.50x = 2,949,373.84
  5. Step 5: Solve for x
    x = 2,949,373.84/2,763.50
  6. Step 6: Final answer
    x = 1,067.26

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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.