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Finding the Fourth Proportional to 557.62, 836.90 and 311.07

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Solution

The fourth proportional to 557.62, 836.90 and 311.07 is: 466.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.62 : 836.90 = 311.07 : x
  2. Step 2: Convert to fraction form
    557.62/836.90 = 311.07/x
  3. Step 3: Cross multiply
    557.62x = 836.90 × 311.07
  4. Step 4: Simplify right side
    557.62x = 260,330.17
  5. Step 5: Solve for x
    x = 260,330.17/557.62
  6. Step 6: Final answer
    x = 466.86

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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.