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Finding the Fourth Proportional to 406.57, 609.79 and 146.52

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Solution

The fourth proportional to 406.57, 609.79 and 146.52 is: 219.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.57 : 609.79 = 146.52 : x
  2. Step 2: Convert to fraction form
    406.57/609.79 = 146.52/x
  3. Step 3: Cross multiply
    406.57x = 609.79 × 146.52
  4. Step 4: Simplify right side
    406.57x = 89,346.06
  5. Step 5: Solve for x
    x = 89,346.06/406.57
  6. Step 6: Final answer
    x = 219.75

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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.