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Finding the Fourth Proportional to 431.24, 645.89 and 235.94

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Solution

The fourth proportional to 431.24, 645.89 and 235.94 is: 353.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.24 : 645.89 = 235.94 : x
  2. Step 2: Convert to fraction form
    431.24/645.89 = 235.94/x
  3. Step 3: Cross multiply
    431.24x = 645.89 × 235.94
  4. Step 4: Simplify right side
    431.24x = 152,386.88
  5. Step 5: Solve for x
    x = 152,386.88/431.24
  6. Step 6: Final answer
    x = 353.37

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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.