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Finding the Fourth Proportional to 479.94, 662.42 and 314.30

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Solution

The fourth proportional to 479.94, 662.42 and 314.30 is: 433.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.94 : 662.42 = 314.30 : x
  2. Step 2: Convert to fraction form
    479.94/662.42 = 314.30/x
  3. Step 3: Cross multiply
    479.94x = 662.42 × 314.30
  4. Step 4: Simplify right side
    479.94x = 208,193.72
  5. Step 5: Solve for x
    x = 208,193.72/479.94
  6. Step 6: Final answer
    x = 433.79

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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.