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Finding the Fourth Proportional to 339.77, 509.82 and 320.87

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Solution

The fourth proportional to 339.77, 509.82 and 320.87 is: 481.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.77 : 509.82 = 320.87 : x
  2. Step 2: Convert to fraction form
    339.77/509.82 = 320.87/x
  3. Step 3: Cross multiply
    339.77x = 509.82 × 320.87
  4. Step 4: Simplify right side
    339.77x = 163,586.01
  5. Step 5: Solve for x
    x = 163,586.01/339.77
  6. Step 6: Final answer
    x = 481.46

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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.