Home / 3,280.18-4,920.81-1,636.78

Finding the Fourth Proportional to 3,280.18, 4,920.81 and 1,636.78

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Solution

The fourth proportional to 3,280.18, 4,920.81 and 1,636.78 is: 2,455.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.18 : 4,920.81 = 1,636.78 : x
  2. Step 2: Convert to fraction form
    3,280.18/4,920.81 = 1,636.78/x
  3. Step 3: Cross multiply
    3,280.18x = 4,920.81 × 1,636.78
  4. Step 4: Simplify right side
    3,280.18x = 8,054,283.39
  5. Step 5: Solve for x
    x = 8,054,283.39/3,280.18
  6. Step 6: Final answer
    x = 2,455.44

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1.5x scale

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.