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Finding the Fourth Proportional to 1,362.50, 2,043.81 and 669.49

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Solution

The fourth proportional to 1,362.50, 2,043.81 and 669.49 is: 1,004.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.50 : 2,043.81 = 669.49 : x
  2. Step 2: Convert to fraction form
    1,362.50/2,043.81 = 669.49/x
  3. Step 3: Cross multiply
    1,362.50x = 2,043.81 × 669.49
  4. Step 4: Simplify right side
    1,362.50x = 1,368,305.25
  5. Step 5: Solve for x
    x = 1,368,305.25/1,362.50
  6. Step 6: Final answer
    x = 1,004.26

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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.