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Finding the Fourth Proportional to 436.05, 601.38 and 311.48

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Solution

The fourth proportional to 436.05, 601.38 and 311.48 is: 429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.05 : 601.38 = 311.48 : x
  2. Step 2: Convert to fraction form
    436.05/601.38 = 311.48/x
  3. Step 3: Cross multiply
    436.05x = 601.38 × 311.48
  4. Step 4: Simplify right side
    436.05x = 187,317.84
  5. Step 5: Solve for x
    x = 187,317.84/436.05
  6. Step 6: Final answer
    x = 429.58

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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.