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Finding the Fourth Proportional to 509.67, 703.34 and 276.79

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Solution

The fourth proportional to 509.67, 703.34 and 276.79 is: 381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.67 : 703.34 = 276.79 : x
  2. Step 2: Convert to fraction form
    509.67/703.34 = 276.79/x
  3. Step 3: Cross multiply
    509.67x = 703.34 × 276.79
  4. Step 4: Simplify right side
    509.67x = 194,676.79
  5. Step 5: Solve for x
    x = 194,676.79/509.67
  6. Step 6: Final answer
    x = 381.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.