Home / 3,280.10-4,921.33-1,405.21

Finding the Fourth Proportional to 3,280.10, 4,921.33 and 1,405.21

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Solution

The fourth proportional to 3,280.10, 4,921.33 and 1,405.21 is: 2,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.10 : 4,921.33 = 1,405.21 : x
  2. Step 2: Convert to fraction form
    3,280.10/4,921.33 = 1,405.21/x
  3. Step 3: Cross multiply
    3,280.10x = 4,921.33 × 1,405.21
  4. Step 4: Simplify right side
    3,280.10x = 6,915,483.67
  5. Step 5: Solve for x
    x = 6,915,483.67/3,280.10
  6. Step 6: Final answer
    x = 2,108.31

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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.