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Finding the Fourth Proportional to 406.48, 609.76 and 400.20

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Solution

The fourth proportional to 406.48, 609.76 and 400.20 is: 600.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.48 : 609.76 = 400.20 : x
  2. Step 2: Convert to fraction form
    406.48/609.76 = 400.20/x
  3. Step 3: Cross multiply
    406.48x = 609.76 × 400.20
  4. Step 4: Simplify right side
    406.48x = 244,025.95
  5. Step 5: Solve for x
    x = 244,025.95/406.48
  6. Step 6: Final answer
    x = 600.34

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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.