Home / 3,620.31-5,431.02-1,280.62

Finding the Fourth Proportional to 3,620.31, 5,431.02 and 1,280.62

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Solution

The fourth proportional to 3,620.31, 5,431.02 and 1,280.62 is: 1,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.31 : 5,431.02 = 1,280.62 : x
  2. Step 2: Convert to fraction form
    3,620.31/5,431.02 = 1,280.62/x
  3. Step 3: Cross multiply
    3,620.31x = 5,431.02 × 1,280.62
  4. Step 4: Simplify right side
    3,620.31x = 6,955,072.83
  5. Step 5: Solve for x
    x = 6,955,072.83/3,620.31
  6. Step 6: Final answer
    x = 1,921.13

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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.