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Finding the Fourth Proportional to 1,193.80, 1,790.10 and 543.80

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Solution

The fourth proportional to 1,193.80, 1,790.10 and 543.80 is: 815.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.80 : 1,790.10 = 543.80 : x
  2. Step 2: Convert to fraction form
    1,193.80/1,790.10 = 543.80/x
  3. Step 3: Cross multiply
    1,193.80x = 1,790.10 × 543.80
  4. Step 4: Simplify right side
    1,193.80x = 973,456.38
  5. Step 5: Solve for x
    x = 973,456.38/1,193.80
  6. Step 6: Final answer
    x = 815.43

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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.