Home / 1,621.40-2,236.37-957.78

Finding the Fourth Proportional to 1,621.40, 2,236.37 and 957.78

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Solution

The fourth proportional to 1,621.40, 2,236.37 and 957.78 is: 1,321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.40 : 2,236.37 = 957.78 : x
  2. Step 2: Convert to fraction form
    1,621.40/2,236.37 = 957.78/x
  3. Step 3: Cross multiply
    1,621.40x = 2,236.37 × 957.78
  4. Step 4: Simplify right side
    1,621.40x = 2,141,945.67
  5. Step 5: Solve for x
    x = 2,141,945.67/1,621.40
  6. Step 6: Final answer
    x = 1,321.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.