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Finding the Fourth Proportional to 1,189.08, 1,782.95 and 824.04

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Solution

The fourth proportional to 1,189.08, 1,782.95 and 824.04 is: 1,235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.08 : 1,782.95 = 824.04 : x
  2. Step 2: Convert to fraction form
    1,189.08/1,782.95 = 824.04/x
  3. Step 3: Cross multiply
    1,189.08x = 1,782.95 × 824.04
  4. Step 4: Simplify right side
    1,189.08x = 1,469,218.00
  5. Step 5: Solve for x
    x = 1,469,218.00/1,189.08
  6. Step 6: Final answer
    x = 1,235.59

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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.