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Finding the Fourth Proportional to 557.89, 836.80 and 211.38

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Solution

The fourth proportional to 557.89, 836.80 and 211.38 is: 317.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.89 : 836.80 = 211.38 : x
  2. Step 2: Convert to fraction form
    557.89/836.80 = 211.38/x
  3. Step 3: Cross multiply
    557.89x = 836.80 × 211.38
  4. Step 4: Simplify right side
    557.89x = 176,879.12
  5. Step 5: Solve for x
    x = 176,879.12/557.89
  6. Step 6: Final answer
    x = 317.05

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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.