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Finding the Fourth Proportional to 397.45, 548.18 and 292.51

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Solution

The fourth proportional to 397.45, 548.18 and 292.51 is: 403.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.45 : 548.18 = 292.51 : x
  2. Step 2: Convert to fraction form
    397.45/548.18 = 292.51/x
  3. Step 3: Cross multiply
    397.45x = 548.18 × 292.51
  4. Step 4: Simplify right side
    397.45x = 160,348.45
  5. Step 5: Solve for x
    x = 160,348.45/397.45
  6. Step 6: Final answer
    x = 403.44

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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.