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Finding the Fourth Proportional to 439.79, 657.70 and 335.70

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Solution

The fourth proportional to 439.79, 657.70 and 335.70 is: 502.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.79 : 657.70 = 335.70 : x
  2. Step 2: Convert to fraction form
    439.79/657.70 = 335.70/x
  3. Step 3: Cross multiply
    439.79x = 657.70 × 335.70
  4. Step 4: Simplify right side
    439.79x = 220,789.05
  5. Step 5: Solve for x
    x = 220,789.05/439.79
  6. Step 6: Final answer
    x = 502.04

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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.