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Finding the Fourth Proportional to 1,362.47, 2,043.68 and 438.09

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Solution

The fourth proportional to 1,362.47, 2,043.68 and 438.09 is: 657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.47 : 2,043.68 = 438.09 : x
  2. Step 2: Convert to fraction form
    1,362.47/2,043.68 = 438.09/x
  3. Step 3: Cross multiply
    1,362.47x = 2,043.68 × 438.09
  4. Step 4: Simplify right side
    1,362.47x = 895,313.58
  5. Step 5: Solve for x
    x = 895,313.58/1,362.47
  6. Step 6: Final answer
    x = 657.13

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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.