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Finding the Fourth Proportional to 3,428.54, 5,142.50 and 1,672.86

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Solution

The fourth proportional to 3,428.54, 5,142.50 and 1,672.86 is: 2,509.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.54 : 5,142.50 = 1,672.86 : x
  2. Step 2: Convert to fraction form
    3,428.54/5,142.50 = 1,672.86/x
  3. Step 3: Cross multiply
    3,428.54x = 5,142.50 × 1,672.86
  4. Step 4: Simplify right side
    3,428.54x = 8,602,682.55
  5. Step 5: Solve for x
    x = 8,602,682.55/3,428.54
  6. Step 6: Final answer
    x = 2,509.14

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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.