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Finding the Fourth Proportional to 476.54, 657.93 and 308.79

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Solution

The fourth proportional to 476.54, 657.93 and 308.79 is: 426.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.54 : 657.93 = 308.79 : x
  2. Step 2: Convert to fraction form
    476.54/657.93 = 308.79/x
  3. Step 3: Cross multiply
    476.54x = 657.93 × 308.79
  4. Step 4: Simplify right side
    476.54x = 203,162.20
  5. Step 5: Solve for x
    x = 203,162.20/476.54
  6. Step 6: Final answer
    x = 426.33

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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.