Home / 2,857.23-4,280.31-1,620.90

Finding the Fourth Proportional to 2,857.23, 4,280.31 and 1,620.90

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Solution

The fourth proportional to 2,857.23, 4,280.31 and 1,620.90 is: 2,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.23 : 4,280.31 = 1,620.90 : x
  2. Step 2: Convert to fraction form
    2,857.23/4,280.31 = 1,620.90/x
  3. Step 3: Cross multiply
    2,857.23x = 4,280.31 × 1,620.90
  4. Step 4: Simplify right side
    2,857.23x = 6,937,954.48
  5. Step 5: Solve for x
    x = 6,937,954.48/2,857.23
  6. Step 6: Final answer
    x = 2,428.21

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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.