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Finding the Fourth Proportional to 580.40, 801 and 331.80

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Solution

The fourth proportional to 580.40, 801 and 331.80 is: 457.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.40 : 801 = 331.80 : x
  2. Step 2: Convert to fraction form
    580.40/801 = 331.80/x
  3. Step 3: Cross multiply
    580.40x = 801 × 331.80
  4. Step 4: Simplify right side
    580.40x = 265,771.80
  5. Step 5: Solve for x
    x = 265,771.80/580.40
  6. Step 6: Final answer
    x = 457.91

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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.