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Finding the Fourth Proportional to 439.72, 659.34 and 302.80

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Solution

The fourth proportional to 439.72, 659.34 and 302.80 is: 454.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.72 : 659.34 = 302.80 : x
  2. Step 2: Convert to fraction form
    439.72/659.34 = 302.80/x
  3. Step 3: Cross multiply
    439.72x = 659.34 × 302.80
  4. Step 4: Simplify right side
    439.72x = 199,648.15
  5. Step 5: Solve for x
    x = 199,648.15/439.72
  6. Step 6: Final answer
    x = 454.03

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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.