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Finding the Fourth Proportional to 3,429.76, 5,133.44 and 2,943.20

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Solution

The fourth proportional to 3,429.76, 5,133.44 and 2,943.20 is: 4,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.76 : 5,133.44 = 2,943.20 : x
  2. Step 2: Convert to fraction form
    3,429.76/5,133.44 = 2,943.20/x
  3. Step 3: Cross multiply
    3,429.76x = 5,133.44 × 2,943.20
  4. Step 4: Simplify right side
    3,429.76x = 15,108,740.61
  5. Step 5: Solve for x
    x = 15,108,740.61/3,429.76
  6. Step 6: Final answer
    x = 4,405.19

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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.