Home / 2,173.32-2,999.57-1,289.61

Finding the Fourth Proportional to 2,173.32, 2,999.57 and 1,289.61

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Solution

The fourth proportional to 2,173.32, 2,999.57 and 1,289.61 is: 1,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.32 : 2,999.57 = 1,289.61 : x
  2. Step 2: Convert to fraction form
    2,173.32/2,999.57 = 1,289.61/x
  3. Step 3: Cross multiply
    2,173.32x = 2,999.57 × 1,289.61
  4. Step 4: Simplify right side
    2,173.32x = 3,868,269.02
  5. Step 5: Solve for x
    x = 3,868,269.02/2,173.32
  6. Step 6: Final answer
    x = 1,779.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.