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Finding the Fourth Proportional to 339, 509.40 and 337.20

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Solution

The fourth proportional to 339, 509.40 and 337.20 is: 506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339 : 509.40 = 337.20 : x
  2. Step 2: Convert to fraction form
    339/509.40 = 337.20/x
  3. Step 3: Cross multiply
    339x = 509.40 × 337.20
  4. Step 4: Simplify right side
    339x = 171,769.68
  5. Step 5: Solve for x
    x = 171,769.68/339
  6. Step 6: Final answer
    x = 506.70

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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.