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Finding the Fourth Proportional to 347.22, 520.22 and 309.56

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Solution

The fourth proportional to 347.22, 520.22 and 309.56 is: 463.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.22 : 520.22 = 309.56 : x
  2. Step 2: Convert to fraction form
    347.22/520.22 = 309.56/x
  3. Step 3: Cross multiply
    347.22x = 520.22 × 309.56
  4. Step 4: Simplify right side
    347.22x = 161,036.70
  5. Step 5: Solve for x
    x = 161,036.70/347.22
  6. Step 6: Final answer
    x = 463.79

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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.