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Finding the Fourth Proportional to 257.04, 354.30 and 235.85

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Solution

The fourth proportional to 257.04, 354.30 and 235.85 is: 325.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.04 : 354.30 = 235.85 : x
  2. Step 2: Convert to fraction form
    257.04/354.30 = 235.85/x
  3. Step 3: Cross multiply
    257.04x = 354.30 × 235.85
  4. Step 4: Simplify right side
    257.04x = 83,559.88
  5. Step 5: Solve for x
    x = 83,559.88/257.04
  6. Step 6: Final answer
    x = 325.09

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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.