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Finding the Fourth Proportional to 1,362.68, 2,043.56 and 438.01

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Solution

The fourth proportional to 1,362.68, 2,043.56 and 438.01 is: 656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.68 : 2,043.56 = 438.01 : x
  2. Step 2: Convert to fraction form
    1,362.68/2,043.56 = 438.01/x
  3. Step 3: Cross multiply
    1,362.68x = 2,043.56 × 438.01
  4. Step 4: Simplify right side
    1,362.68x = 895,103.37
  5. Step 5: Solve for x
    x = 895,103.37/1,362.68
  6. Step 6: Final answer
    x = 656.87

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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.