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Finding the Fourth Proportional to 406.60, 609.18 and 262.12

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Solution

The fourth proportional to 406.60, 609.18 and 262.12 is: 392.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.60 : 609.18 = 262.12 : x
  2. Step 2: Convert to fraction form
    406.60/609.18 = 262.12/x
  3. Step 3: Cross multiply
    406.60x = 609.18 × 262.12
  4. Step 4: Simplify right side
    406.60x = 159,678.26
  5. Step 5: Solve for x
    x = 159,678.26/406.60
  6. Step 6: Final answer
    x = 392.72

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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.