Home / 3,280.78-4,909.80-2,688.94

Finding the Fourth Proportional to 3,280.78, 4,909.80 and 2,688.94

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Solution

The fourth proportional to 3,280.78, 4,909.80 and 2,688.94 is: 4,024.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.78 : 4,909.80 = 2,688.94 : x
  2. Step 2: Convert to fraction form
    3,280.78/4,909.80 = 2,688.94/x
  3. Step 3: Cross multiply
    3,280.78x = 4,909.80 × 2,688.94
  4. Step 4: Simplify right side
    3,280.78x = 13,202,157.61
  5. Step 5: Solve for x
    x = 13,202,157.61/3,280.78
  6. Step 6: Final answer
    x = 4,024.09

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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.