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Finding the Fourth Proportional to 438.37, 604.89 and 251.80

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Solution

The fourth proportional to 438.37, 604.89 and 251.80 is: 347.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.37 : 604.89 = 251.80 : x
  2. Step 2: Convert to fraction form
    438.37/604.89 = 251.80/x
  3. Step 3: Cross multiply
    438.37x = 604.89 × 251.80
  4. Step 4: Simplify right side
    438.37x = 152,311.30
  5. Step 5: Solve for x
    x = 152,311.30/438.37
  6. Step 6: Final answer
    x = 347.45

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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.