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Finding the Fourth Proportional to 438, 604.48 and 251.50

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Solution

The fourth proportional to 438, 604.48 and 251.50 is: 347.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    438 : 604.48 = 251.50 : x
  2. Step 2: Convert to fraction form
    438/604.48 = 251.50/x
  3. Step 3: Cross multiply
    438x = 604.48 × 251.50
  4. Step 4: Simplify right side
    438x = 152,026.72
  5. Step 5: Solve for x
    x = 152,026.72/438
  6. Step 6: Final answer
    x = 347.09

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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.