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Finding the Fourth Proportional to 554.34, 764.94 and 305.64

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Solution

The fourth proportional to 554.34, 764.94 and 305.64 is: 421.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.34 : 764.94 = 305.64 : x
  2. Step 2: Convert to fraction form
    554.34/764.94 = 305.64/x
  3. Step 3: Cross multiply
    554.34x = 764.94 × 305.64
  4. Step 4: Simplify right side
    554.34x = 233,796.26
  5. Step 5: Solve for x
    x = 233,796.26/554.34
  6. Step 6: Final answer
    x = 421.76

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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.