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Finding the Fourth Proportional to 554.08, 764.55 and 355.09

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Solution

The fourth proportional to 554.08, 764.55 and 355.09 is: 489.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.08 : 764.55 = 355.09 : x
  2. Step 2: Convert to fraction form
    554.08/764.55 = 355.09/x
  3. Step 3: Cross multiply
    554.08x = 764.55 × 355.09
  4. Step 4: Simplify right side
    554.08x = 271,483.24
  5. Step 5: Solve for x
    x = 271,483.24/554.08
  6. Step 6: Final answer
    x = 489.97

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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.