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Finding the Fourth Proportional to 339.56, 468.35 and 287.59

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Solution

The fourth proportional to 339.56, 468.35 and 287.59 is: 396.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.56 : 468.35 = 287.59 : x
  2. Step 2: Convert to fraction form
    339.56/468.35 = 287.59/x
  3. Step 3: Cross multiply
    339.56x = 468.35 × 287.59
  4. Step 4: Simplify right side
    339.56x = 134,692.78
  5. Step 5: Solve for x
    x = 134,692.78/339.56
  6. Step 6: Final answer
    x = 396.67

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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.