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Finding the Fourth Proportional to 343.84, 514.79 and 311.40

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Solution

The fourth proportional to 343.84, 514.79 and 311.40 is: 466.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.84 : 514.79 = 311.40 : x
  2. Step 2: Convert to fraction form
    343.84/514.79 = 311.40/x
  3. Step 3: Cross multiply
    343.84x = 514.79 × 311.40
  4. Step 4: Simplify right side
    343.84x = 160,305.22
  5. Step 5: Solve for x
    x = 160,305.22/343.84
  6. Step 6: Final answer
    x = 466.22

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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.