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Finding the Fourth Proportional to 439.21, 657.60 and 294.63

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Solution

The fourth proportional to 439.21, 657.60 and 294.63 is: 441.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.21 : 657.60 = 294.63 : x
  2. Step 2: Convert to fraction form
    439.21/657.60 = 294.63/x
  3. Step 3: Cross multiply
    439.21x = 657.60 × 294.63
  4. Step 4: Simplify right side
    439.21x = 193,748.69
  5. Step 5: Solve for x
    x = 193,748.69/439.21
  6. Step 6: Final answer
    x = 441.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.