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Finding the Fourth Proportional to 521.91, 720.09 and 482.63

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Solution

The fourth proportional to 521.91, 720.09 and 482.63 is: 665.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.91 : 720.09 = 482.63 : x
  2. Step 2: Convert to fraction form
    521.91/720.09 = 482.63/x
  3. Step 3: Cross multiply
    521.91x = 720.09 × 482.63
  4. Step 4: Simplify right side
    521.91x = 347,533.44
  5. Step 5: Solve for x
    x = 347,533.44/521.91
  6. Step 6: Final answer
    x = 665.89

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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.