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Finding the Fourth Proportional to 439.35, 606.09 and 291.80

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Solution

The fourth proportional to 439.35, 606.09 and 291.80 is: 402.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.35 : 606.09 = 291.80 : x
  2. Step 2: Convert to fraction form
    439.35/606.09 = 291.80/x
  3. Step 3: Cross multiply
    439.35x = 606.09 × 291.80
  4. Step 4: Simplify right side
    439.35x = 176,852.57
  5. Step 5: Solve for x
    x = 176,852.57/439.35
  6. Step 6: Final answer
    x = 402.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.