Home / 3,279.96-4,914.47-1,428.30

Finding the Fourth Proportional to 3,279.96, 4,914.47 and 1,428.30

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Solution

The fourth proportional to 3,279.96, 4,914.47 and 1,428.30 is: 2,140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.96 : 4,914.47 = 1,428.30 : x
  2. Step 2: Convert to fraction form
    3,279.96/4,914.47 = 1,428.30/x
  3. Step 3: Cross multiply
    3,279.96x = 4,914.47 × 1,428.30
  4. Step 4: Simplify right side
    3,279.96x = 7,019,341.07
  5. Step 5: Solve for x
    x = 7,019,341.07/3,279.96
  6. Step 6: Final answer
    x = 2,140.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.