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Finding the Fourth Proportional to 2,109.19, 3,163.78 and 570.19

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Solution

The fourth proportional to 2,109.19, 3,163.78 and 570.19 is: 855.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.19 : 3,163.78 = 570.19 : x
  2. Step 2: Convert to fraction form
    2,109.19/3,163.78 = 570.19/x
  3. Step 3: Cross multiply
    2,109.19x = 3,163.78 × 570.19
  4. Step 4: Simplify right side
    2,109.19x = 1,803,955.72
  5. Step 5: Solve for x
    x = 1,803,955.72/2,109.19
  6. Step 6: Final answer
    x = 855.28

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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.