Home / 1,621.10-2,428.68-891.56

Finding the Fourth Proportional to 1,621.10, 2,428.68 and 891.56

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Solution

The fourth proportional to 1,621.10, 2,428.68 and 891.56 is: 1,335.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.10 : 2,428.68 = 891.56 : x
  2. Step 2: Convert to fraction form
    1,621.10/2,428.68 = 891.56/x
  3. Step 3: Cross multiply
    1,621.10x = 2,428.68 × 891.56
  4. Step 4: Simplify right side
    1,621.10x = 2,165,313.94
  5. Step 5: Solve for x
    x = 2,165,313.94/1,621.10
  6. Step 6: Final answer
    x = 1,335.71

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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.