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Finding the Fourth Proportional to 579.21, 868.31 and 348.21

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Solution

The fourth proportional to 579.21, 868.31 and 348.21 is: 522.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.21 : 868.31 = 348.21 : x
  2. Step 2: Convert to fraction form
    579.21/868.31 = 348.21/x
  3. Step 3: Cross multiply
    579.21x = 868.31 × 348.21
  4. Step 4: Simplify right side
    579.21x = 302,354.52
  5. Step 5: Solve for x
    x = 302,354.52/579.21
  6. Step 6: Final answer
    x = 522.01

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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.