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Finding the Fourth Proportional to 406.62, 609.32 and 285.12

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Solution

The fourth proportional to 406.62, 609.32 and 285.12 is: 427.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.62 : 609.32 = 285.12 : x
  2. Step 2: Convert to fraction form
    406.62/609.32 = 285.12/x
  3. Step 3: Cross multiply
    406.62x = 609.32 × 285.12
  4. Step 4: Simplify right side
    406.62x = 173,730.03
  5. Step 5: Solve for x
    x = 173,730.03/406.62
  6. Step 6: Final answer
    x = 427.25

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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.