Home / 2,173.79-2,999.84-1,289.57

Finding the Fourth Proportional to 2,173.79, 2,999.84 and 1,289.57

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Solution

The fourth proportional to 2,173.79, 2,999.84 and 1,289.57 is: 1,779.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.79 : 2,999.84 = 1,289.57 : x
  2. Step 2: Convert to fraction form
    2,173.79/2,999.84 = 1,289.57/x
  3. Step 3: Cross multiply
    2,173.79x = 2,999.84 × 1,289.57
  4. Step 4: Simplify right side
    2,173.79x = 3,868,499.10
  5. Step 5: Solve for x
    x = 3,868,499.10/2,173.79
  6. Step 6: Final answer
    x = 1,779.61

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1.5x scale

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.