Home / 3,280.90-4,921.32-1,406.51

Finding the Fourth Proportional to 3,280.90, 4,921.32 and 1,406.51

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Solution

The fourth proportional to 3,280.90, 4,921.32 and 1,406.51 is: 2,109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.90 : 4,921.32 = 1,406.51 : x
  2. Step 2: Convert to fraction form
    3,280.90/4,921.32 = 1,406.51/x
  3. Step 3: Cross multiply
    3,280.90x = 4,921.32 × 1,406.51
  4. Step 4: Simplify right side
    3,280.90x = 6,921,885.79
  5. Step 5: Solve for x
    x = 6,921,885.79/3,280.90
  6. Step 6: Final answer
    x = 2,109.75

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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.