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Finding the Fourth Proportional to 554.30, 764.92 and 318.29

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Solution

The fourth proportional to 554.30, 764.92 and 318.29 is: 439.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.30 : 764.92 = 318.29 : x
  2. Step 2: Convert to fraction form
    554.30/764.92 = 318.29/x
  3. Step 3: Cross multiply
    554.30x = 764.92 × 318.29
  4. Step 4: Simplify right side
    554.30x = 243,466.39
  5. Step 5: Solve for x
    x = 243,466.39/554.30
  6. Step 6: Final answer
    x = 439.23

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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.