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Finding the Fourth Proportional to 579.40, 799.53 and 330.73

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Solution

The fourth proportional to 579.40, 799.53 and 330.73 is: 456.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.40 : 799.53 = 330.73 : x
  2. Step 2: Convert to fraction form
    579.40/799.53 = 330.73/x
  3. Step 3: Cross multiply
    579.40x = 799.53 × 330.73
  4. Step 4: Simplify right side
    579.40x = 264,428.56
  5. Step 5: Solve for x
    x = 264,428.56/579.40
  6. Step 6: Final answer
    x = 456.38

Related Problems

Find fourth proportional to 289.70, 399.77 and 165.37
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Double scale
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Similar ratio
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1.5x scale

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.