Home / 643.28-964.77-181.11

Finding the Fourth Proportional to 643.28, 964.77 and 181.11

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Solution

The fourth proportional to 643.28, 964.77 and 181.11 is: 271.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.28 : 964.77 = 181.11 : x
  2. Step 2: Convert to fraction form
    643.28/964.77 = 181.11/x
  3. Step 3: Cross multiply
    643.28x = 964.77 × 181.11
  4. Step 4: Simplify right side
    643.28x = 174,726.56
  5. Step 5: Solve for x
    x = 174,726.56/643.28
  6. Step 6: Final answer
    x = 271.62

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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.