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Finding the Fourth Proportional to 320.58, 479.88 and 216.27

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Solution

The fourth proportional to 320.58, 479.88 and 216.27 is: 323.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.58 : 479.88 = 216.27 : x
  2. Step 2: Convert to fraction form
    320.58/479.88 = 216.27/x
  3. Step 3: Cross multiply
    320.58x = 479.88 × 216.27
  4. Step 4: Simplify right side
    320.58x = 103,783.65
  5. Step 5: Solve for x
    x = 103,783.65/320.58
  6. Step 6: Final answer
    x = 323.74

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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.