Home / 2,140.56-2,939.76-1,790.64

Finding the Fourth Proportional to 2,140.56, 2,939.76 and 1,790.64

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Solution

The fourth proportional to 2,140.56, 2,939.76 and 1,790.64 is: 2,459.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.56 : 2,939.76 = 1,790.64 : x
  2. Step 2: Convert to fraction form
    2,140.56/2,939.76 = 1,790.64/x
  3. Step 3: Cross multiply
    2,140.56x = 2,939.76 × 1,790.64
  4. Step 4: Simplify right side
    2,140.56x = 5,264,051.85
  5. Step 5: Solve for x
    x = 5,264,051.85/2,140.56
  6. Step 6: Final answer
    x = 2,459.19

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.