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Finding the Fourth Proportional to 1,379.37, 2,069.73 and 558.23

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Solution

The fourth proportional to 1,379.37, 2,069.73 and 558.23 is: 837.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.37 : 2,069.73 = 558.23 : x
  2. Step 2: Convert to fraction form
    1,379.37/2,069.73 = 558.23/x
  3. Step 3: Cross multiply
    1,379.37x = 2,069.73 × 558.23
  4. Step 4: Simplify right side
    1,379.37x = 1,155,390.55
  5. Step 5: Solve for x
    x = 1,155,390.55/1,379.37
  6. Step 6: Final answer
    x = 837.62

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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.