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Finding the Fourth Proportional to 554.36, 765.35 and 492.85

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Solution

The fourth proportional to 554.36, 765.35 and 492.85 is: 680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.36 : 765.35 = 492.85 : x
  2. Step 2: Convert to fraction form
    554.36/765.35 = 492.85/x
  3. Step 3: Cross multiply
    554.36x = 765.35 × 492.85
  4. Step 4: Simplify right side
    554.36x = 377,202.75
  5. Step 5: Solve for x
    x = 377,202.75/554.36
  6. Step 6: Final answer
    x = 680.43

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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.