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Finding the Fourth Proportional to 437.05, 603.31 and 279.69

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Solution

The fourth proportional to 437.05, 603.31 and 279.69 is: 386.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.05 : 603.31 = 279.69 : x
  2. Step 2: Convert to fraction form
    437.05/603.31 = 279.69/x
  3. Step 3: Cross multiply
    437.05x = 603.31 × 279.69
  4. Step 4: Simplify right side
    437.05x = 168,739.77
  5. Step 5: Solve for x
    x = 168,739.77/437.05
  6. Step 6: Final answer
    x = 386.09

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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.