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Finding the Fourth Proportional to 2,094.20, 3,140.56 and 613

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Solution

The fourth proportional to 2,094.20, 3,140.56 and 613 is: 919.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,094.20 : 3,140.56 = 613 : x
  2. Step 2: Convert to fraction form
    2,094.20/3,140.56 = 613/x
  3. Step 3: Cross multiply
    2,094.20x = 3,140.56 × 613
  4. Step 4: Simplify right side
    2,094.20x = 1,925,163.28
  5. Step 5: Solve for x
    x = 1,925,163.28/2,094.20
  6. Step 6: Final answer
    x = 919.28

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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.