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Finding the Fourth Proportional to 347.82, 520.92 and 210.75

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Solution

The fourth proportional to 347.82, 520.92 and 210.75 is: 315.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.82 : 520.92 = 210.75 : x
  2. Step 2: Convert to fraction form
    347.82/520.92 = 210.75/x
  3. Step 3: Cross multiply
    347.82x = 520.92 × 210.75
  4. Step 4: Simplify right side
    347.82x = 109,783.89
  5. Step 5: Solve for x
    x = 109,783.89/347.82
  6. Step 6: Final answer
    x = 315.63

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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.