Home / 2,173.31-2,999.45-1,289.11

Finding the Fourth Proportional to 2,173.31, 2,999.45 and 1,289.11

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Solution

The fourth proportional to 2,173.31, 2,999.45 and 1,289.11 is: 1,779.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.31 : 2,999.45 = 1,289.11 : x
  2. Step 2: Convert to fraction form
    2,173.31/2,999.45 = 1,289.11/x
  3. Step 3: Cross multiply
    2,173.31x = 2,999.45 × 1,289.11
  4. Step 4: Simplify right side
    2,173.31x = 3,866,620.99
  5. Step 5: Solve for x
    x = 3,866,620.99/2,173.31
  6. Step 6: Final answer
    x = 1,779.14

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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.