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Finding the Fourth Proportional to 383.45, 528.44 and 354.03

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Solution

The fourth proportional to 383.45, 528.44 and 354.03 is: 487.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.45 : 528.44 = 354.03 : x
  2. Step 2: Convert to fraction form
    383.45/528.44 = 354.03/x
  3. Step 3: Cross multiply
    383.45x = 528.44 × 354.03
  4. Step 4: Simplify right side
    383.45x = 187,081.84
  5. Step 5: Solve for x
    x = 187,081.84/383.45
  6. Step 6: Final answer
    x = 487.90

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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.