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Finding the Fourth Proportional to 3,378.96, 5,064.12 and 1,428.48

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Solution

The fourth proportional to 3,378.96, 5,064.12 and 1,428.48 is: 2,140.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.96 : 5,064.12 = 1,428.48 : x
  2. Step 2: Convert to fraction form
    3,378.96/5,064.12 = 1,428.48/x
  3. Step 3: Cross multiply
    3,378.96x = 5,064.12 × 1,428.48
  4. Step 4: Simplify right side
    3,378.96x = 7,233,994.14
  5. Step 5: Solve for x
    x = 7,233,994.14/3,378.96
  6. Step 6: Final answer
    x = 2,140.89

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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.