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Finding the Fourth Proportional to 335.70, 503.10 and 239.40

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Solution

The fourth proportional to 335.70, 503.10 and 239.40 is: 358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.70 : 503.10 = 239.40 : x
  2. Step 2: Convert to fraction form
    335.70/503.10 = 239.40/x
  3. Step 3: Cross multiply
    335.70x = 503.10 × 239.40
  4. Step 4: Simplify right side
    335.70x = 120,442.14
  5. Step 5: Solve for x
    x = 120,442.14/335.70
  6. Step 6: Final answer
    x = 358.78

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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.