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Finding the Fourth Proportional to 335.79, 503.06 and 213.80

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Solution

The fourth proportional to 335.79, 503.06 and 213.80 is: 320.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.79 : 503.06 = 213.80 : x
  2. Step 2: Convert to fraction form
    335.79/503.06 = 213.80/x
  3. Step 3: Cross multiply
    335.79x = 503.06 × 213.80
  4. Step 4: Simplify right side
    335.79x = 107,550.64
  5. Step 5: Solve for x
    x = 107,550.64/335.79
  6. Step 6: Final answer
    x = 320.29

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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.