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Finding the Fourth Proportional to 320.34, 480.68 and 314.61

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Solution

The fourth proportional to 320.34, 480.68 and 314.61 is: 472.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.34 : 480.68 = 314.61 : x
  2. Step 2: Convert to fraction form
    320.34/480.68 = 314.61/x
  3. Step 3: Cross multiply
    320.34x = 480.68 × 314.61
  4. Step 4: Simplify right side
    320.34x = 151,226.36
  5. Step 5: Solve for x
    x = 151,226.36/320.34
  6. Step 6: Final answer
    x = 472.09

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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.