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Finding the Fourth Proportional to 479.86, 662.75 and 415.16

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Solution

The fourth proportional to 479.86, 662.75 and 415.16 is: 573.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.86 : 662.75 = 415.16 : x
  2. Step 2: Convert to fraction form
    479.86/662.75 = 415.16/x
  3. Step 3: Cross multiply
    479.86x = 662.75 × 415.16
  4. Step 4: Simplify right side
    479.86x = 275,145.94
  5. Step 5: Solve for x
    x = 275,145.94/479.86
  6. Step 6: Final answer
    x = 573.39

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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.