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Finding the Fourth Proportional to 347.96, 519.25 and 311.51

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Solution

The fourth proportional to 347.96, 519.25 and 311.51 is: 464.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.96 : 519.25 = 311.51 : x
  2. Step 2: Convert to fraction form
    347.96/519.25 = 311.51/x
  3. Step 3: Cross multiply
    347.96x = 519.25 × 311.51
  4. Step 4: Simplify right side
    347.96x = 161,748.19
  5. Step 5: Solve for x
    x = 161,748.19/347.96
  6. Step 6: Final answer
    x = 464.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.