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Finding the Fourth Proportional to 442.05, 608.60 and 383.85

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Solution

The fourth proportional to 442.05, 608.60 and 383.85 is: 528.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.05 : 608.60 = 383.85 : x
  2. Step 2: Convert to fraction form
    442.05/608.60 = 383.85/x
  3. Step 3: Cross multiply
    442.05x = 608.60 × 383.85
  4. Step 4: Simplify right side
    442.05x = 233,609.19
  5. Step 5: Solve for x
    x = 233,609.19/442.05
  6. Step 6: Final answer
    x = 528.47

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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.