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Finding the Fourth Proportional to 347.22, 520.05 and 320.21

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Solution

The fourth proportional to 347.22, 520.05 and 320.21 is: 479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.22 : 520.05 = 320.21 : x
  2. Step 2: Convert to fraction form
    347.22/520.05 = 320.21/x
  3. Step 3: Cross multiply
    347.22x = 520.05 × 320.21
  4. Step 4: Simplify right side
    347.22x = 166,522.61
  5. Step 5: Solve for x
    x = 166,522.61/347.22
  6. Step 6: Final answer
    x = 479.60

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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.