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Finding the Fourth Proportional to 406.36, 609.54 and 345.88

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Solution

The fourth proportional to 406.36, 609.54 and 345.88 is: 518.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.36 : 609.54 = 345.88 : x
  2. Step 2: Convert to fraction form
    406.36/609.54 = 345.88/x
  3. Step 3: Cross multiply
    406.36x = 609.54 × 345.88
  4. Step 4: Simplify right side
    406.36x = 210,827.70
  5. Step 5: Solve for x
    x = 210,827.70/406.36
  6. Step 6: Final answer
    x = 518.82

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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.