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Finding the Fourth Proportional to 343.86, 514.80 and 211.74

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Solution

The fourth proportional to 343.86, 514.80 and 211.74 is: 317.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.86 : 514.80 = 211.74 : x
  2. Step 2: Convert to fraction form
    343.86/514.80 = 211.74/x
  3. Step 3: Cross multiply
    343.86x = 514.80 × 211.74
  4. Step 4: Simplify right side
    343.86x = 109,003.75
  5. Step 5: Solve for x
    x = 109,003.75/343.86
  6. Step 6: Final answer
    x = 317.00

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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.