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Finding the Fourth Proportional to 406.72, 608.68 and 346.56

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Solution

The fourth proportional to 406.72, 608.68 and 346.56 is: 518.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.72 : 608.68 = 346.56 : x
  2. Step 2: Convert to fraction form
    406.72/608.68 = 346.56/x
  3. Step 3: Cross multiply
    406.72x = 608.68 × 346.56
  4. Step 4: Simplify right side
    406.72x = 210,944.14
  5. Step 5: Solve for x
    x = 210,944.14/406.72
  6. Step 6: Final answer
    x = 518.65

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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.