Home / 1,179.10-1,769.11-486.10

Finding the Fourth Proportional to 1,179.10, 1,769.11 and 486.10

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Solution

The fourth proportional to 1,179.10, 1,769.11 and 486.10 is: 729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.10 : 1,769.11 = 486.10 : x
  2. Step 2: Convert to fraction form
    1,179.10/1,769.11 = 486.10/x
  3. Step 3: Cross multiply
    1,179.10x = 1,769.11 × 486.10
  4. Step 4: Simplify right side
    1,179.10x = 859,964.37
  5. Step 5: Solve for x
    x = 859,964.37/1,179.10
  6. Step 6: Final answer
    x = 729.34

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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.