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Finding the Fourth Proportional to 406.16, 559.56 and 308

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Solution

The fourth proportional to 406.16, 559.56 and 308 is: 424.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.16 : 559.56 = 308 : x
  2. Step 2: Convert to fraction form
    406.16/559.56 = 308/x
  3. Step 3: Cross multiply
    406.16x = 559.56 × 308
  4. Step 4: Simplify right side
    406.16x = 172,344.48
  5. Step 5: Solve for x
    x = 172,344.48/406.16
  6. Step 6: Final answer
    x = 424.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.