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Finding the Fourth Proportional to 1,628.91, 2,443.37 and 1,339.47

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Solution

The fourth proportional to 1,628.91, 2,443.37 and 1,339.47 is: 2,009.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.91 : 2,443.37 = 1,339.47 : x
  2. Step 2: Convert to fraction form
    1,628.91/2,443.37 = 1,339.47/x
  3. Step 3: Cross multiply
    1,628.91x = 2,443.37 × 1,339.47
  4. Step 4: Simplify right side
    1,628.91x = 3,272,814.12
  5. Step 5: Solve for x
    x = 3,272,814.12/1,628.91
  6. Step 6: Final answer
    x = 2,009.21

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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.