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Finding the Fourth Proportional to 314.05, 471.04 and 211.99

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Solution

The fourth proportional to 314.05, 471.04 and 211.99 is: 317.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.05 : 471.04 = 211.99 : x
  2. Step 2: Convert to fraction form
    314.05/471.04 = 211.99/x
  3. Step 3: Cross multiply
    314.05x = 471.04 × 211.99
  4. Step 4: Simplify right side
    314.05x = 99,855.12
  5. Step 5: Solve for x
    x = 99,855.12/314.05
  6. Step 6: Final answer
    x = 317.96

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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.