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Finding the Fourth Proportional to 479.08, 661.40 and 331.94

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Solution

The fourth proportional to 479.08, 661.40 and 331.94 is: 458.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.08 : 661.40 = 331.94 : x
  2. Step 2: Convert to fraction form
    479.08/661.40 = 331.94/x
  3. Step 3: Cross multiply
    479.08x = 661.40 × 331.94
  4. Step 4: Simplify right side
    479.08x = 219,545.12
  5. Step 5: Solve for x
    x = 219,545.12/479.08
  6. Step 6: Final answer
    x = 458.26

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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.