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Finding the Fourth Proportional to 459.33, 687.89 and 239.37

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Solution

The fourth proportional to 459.33, 687.89 and 239.37 is: 358.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.33 : 687.89 = 239.37 : x
  2. Step 2: Convert to fraction form
    459.33/687.89 = 239.37/x
  3. Step 3: Cross multiply
    459.33x = 687.89 × 239.37
  4. Step 4: Simplify right side
    459.33x = 164,660.83
  5. Step 5: Solve for x
    x = 164,660.83/459.33
  6. Step 6: Final answer
    x = 358.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.