Home / 2,939.30-4,055.40-1,679.90

Finding the Fourth Proportional to 2,939.30, 4,055.40 and 1,679.90

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Solution

The fourth proportional to 2,939.30, 4,055.40 and 1,679.90 is: 2,317.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.30 : 4,055.40 = 1,679.90 : x
  2. Step 2: Convert to fraction form
    2,939.30/4,055.40 = 1,679.90/x
  3. Step 3: Cross multiply
    2,939.30x = 4,055.40 × 1,679.90
  4. Step 4: Simplify right side
    2,939.30x = 6,812,666.46
  5. Step 5: Solve for x
    x = 6,812,666.46/2,939.30
  6. Step 6: Final answer
    x = 2,317.79

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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.