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Finding the Fourth Proportional to 354.33, 528.86 and 317.79

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Solution

The fourth proportional to 354.33, 528.86 and 317.79 is: 474.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.33 : 528.86 = 317.79 : x
  2. Step 2: Convert to fraction form
    354.33/528.86 = 317.79/x
  3. Step 3: Cross multiply
    354.33x = 528.86 × 317.79
  4. Step 4: Simplify right side
    354.33x = 168,067.21
  5. Step 5: Solve for x
    x = 168,067.21/354.33
  6. Step 6: Final answer
    x = 474.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.