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Finding the Fourth Proportional to 431.96, 596.28 and 257.36

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Solution

The fourth proportional to 431.96, 596.28 and 257.36 is: 355.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.96 : 596.28 = 257.36 : x
  2. Step 2: Convert to fraction form
    431.96/596.28 = 257.36/x
  3. Step 3: Cross multiply
    431.96x = 596.28 × 257.36
  4. Step 4: Simplify right side
    431.96x = 153,458.62
  5. Step 5: Solve for x
    x = 153,458.62/431.96
  6. Step 6: Final answer
    x = 355.26

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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.