Home / 1,621.12-2,431.44-646.27

Finding the Fourth Proportional to 1,621.12, 2,431.44 and 646.27

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Solution

The fourth proportional to 1,621.12, 2,431.44 and 646.27 is: 969.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.12 : 2,431.44 = 646.27 : x
  2. Step 2: Convert to fraction form
    1,621.12/2,431.44 = 646.27/x
  3. Step 3: Cross multiply
    1,621.12x = 2,431.44 × 646.27
  4. Step 4: Simplify right side
    1,621.12x = 1,571,366.73
  5. Step 5: Solve for x
    x = 1,571,366.73/1,621.12
  6. Step 6: Final answer
    x = 969.31

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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.