Home / 1,621.20-2,428.20-1,253.10

Finding the Fourth Proportional to 1,621.20, 2,428.20 and 1,253.10

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Solution

The fourth proportional to 1,621.20, 2,428.20 and 1,253.10 is: 1,876.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.20 : 2,428.20 = 1,253.10 : x
  2. Step 2: Convert to fraction form
    1,621.20/2,428.20 = 1,253.10/x
  3. Step 3: Cross multiply
    1,621.20x = 2,428.20 × 1,253.10
  4. Step 4: Simplify right side
    1,621.20x = 3,042,777.42
  5. Step 5: Solve for x
    x = 3,042,777.42/1,621.20
  6. Step 6: Final answer
    x = 1,876.87

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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.