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Finding the Fourth Proportional to 438.04, 603.52 and 319.82

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Solution

The fourth proportional to 438.04, 603.52 and 319.82 is: 440.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.04 : 603.52 = 319.82 : x
  2. Step 2: Convert to fraction form
    438.04/603.52 = 319.82/x
  3. Step 3: Cross multiply
    438.04x = 603.52 × 319.82
  4. Step 4: Simplify right side
    438.04x = 193,013.95
  5. Step 5: Solve for x
    x = 193,013.95/438.04
  6. Step 6: Final answer
    x = 440.63

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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.