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Finding the Fourth Proportional to 554.80, 765.72 and 408.19

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Solution

The fourth proportional to 554.80, 765.72 and 408.19 is: 563.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.80 : 765.72 = 408.19 : x
  2. Step 2: Convert to fraction form
    554.80/765.72 = 408.19/x
  3. Step 3: Cross multiply
    554.80x = 765.72 × 408.19
  4. Step 4: Simplify right side
    554.80x = 312,559.25
  5. Step 5: Solve for x
    x = 312,559.25/554.80
  6. Step 6: Final answer
    x = 563.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.