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Finding the Fourth Proportional to 555.11, 832.90 and 311.84

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Solution

The fourth proportional to 555.11, 832.90 and 311.84 is: 467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.11 : 832.90 = 311.84 : x
  2. Step 2: Convert to fraction form
    555.11/832.90 = 311.84/x
  3. Step 3: Cross multiply
    555.11x = 832.90 × 311.84
  4. Step 4: Simplify right side
    555.11x = 259,731.54
  5. Step 5: Solve for x
    x = 259,731.54/555.11
  6. Step 6: Final answer
    x = 467.89

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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.