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Finding the Fourth Proportional to 349.50, 523.50 and 258.36

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Solution

The fourth proportional to 349.50, 523.50 and 258.36 is: 386.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.50 : 523.50 = 258.36 : x
  2. Step 2: Convert to fraction form
    349.50/523.50 = 258.36/x
  3. Step 3: Cross multiply
    349.50x = 523.50 × 258.36
  4. Step 4: Simplify right side
    349.50x = 135,251.46
  5. Step 5: Solve for x
    x = 135,251.46/349.50
  6. Step 6: Final answer
    x = 386.99

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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.