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Finding the Fourth Proportional to 579.38, 799.57 and 330.69

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Solution

The fourth proportional to 579.38, 799.57 and 330.69 is: 456.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.38 : 799.57 = 330.69 : x
  2. Step 2: Convert to fraction form
    579.38/799.57 = 330.69/x
  3. Step 3: Cross multiply
    579.38x = 799.57 × 330.69
  4. Step 4: Simplify right side
    579.38x = 264,413.22
  5. Step 5: Solve for x
    x = 264,413.22/579.38
  6. Step 6: Final answer
    x = 456.38

Related Problems

Find fourth proportional to 289.69, 399.79 and 165.35
Half scale
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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.