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Finding the Fourth Proportional to 2,386.45, 3,579.78 and 743.03

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Solution

The fourth proportional to 2,386.45, 3,579.78 and 743.03 is: 1,114.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.45 : 3,579.78 = 743.03 : x
  2. Step 2: Convert to fraction form
    2,386.45/3,579.78 = 743.03/x
  3. Step 3: Cross multiply
    2,386.45x = 3,579.78 × 743.03
  4. Step 4: Simplify right side
    2,386.45x = 2,659,880.22
  5. Step 5: Solve for x
    x = 2,659,880.22/2,386.45
  6. Step 6: Final answer
    x = 1,114.58

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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.