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Finding the Fourth Proportional to 318.52, 476.34 and 314.56

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Solution

The fourth proportional to 318.52, 476.34 and 314.56 is: 470.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.52 : 476.34 = 314.56 : x
  2. Step 2: Convert to fraction form
    318.52/476.34 = 314.56/x
  3. Step 3: Cross multiply
    318.52x = 476.34 × 314.56
  4. Step 4: Simplify right side
    318.52x = 149,837.51
  5. Step 5: Solve for x
    x = 149,837.51/318.52
  6. Step 6: Final answer
    x = 470.42

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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.