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Finding the Fourth Proportional to 339.37, 509.02 and 321.60

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Solution

The fourth proportional to 339.37, 509.02 and 321.60 is: 482.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.37 : 509.02 = 321.60 : x
  2. Step 2: Convert to fraction form
    339.37/509.02 = 321.60/x
  3. Step 3: Cross multiply
    339.37x = 509.02 × 321.60
  4. Step 4: Simplify right side
    339.37x = 163,700.83
  5. Step 5: Solve for x
    x = 163,700.83/339.37
  6. Step 6: Final answer
    x = 482.37

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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.