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Finding the Fourth Proportional to 314.54, 472.04 and 257.44

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Solution

The fourth proportional to 314.54, 472.04 and 257.44 is: 386.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.54 : 472.04 = 257.44 : x
  2. Step 2: Convert to fraction form
    314.54/472.04 = 257.44/x
  3. Step 3: Cross multiply
    314.54x = 472.04 × 257.44
  4. Step 4: Simplify right side
    314.54x = 121,521.98
  5. Step 5: Solve for x
    x = 121,521.98/314.54
  6. Step 6: Final answer
    x = 386.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.