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Finding the Fourth Proportional to 482.76, 721.80 and 415.08

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Solution

The fourth proportional to 482.76, 721.80 and 415.08 is: 620.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.76 : 721.80 = 415.08 : x
  2. Step 2: Convert to fraction form
    482.76/721.80 = 415.08/x
  3. Step 3: Cross multiply
    482.76x = 721.80 × 415.08
  4. Step 4: Simplify right side
    482.76x = 299,604.74
  5. Step 5: Solve for x
    x = 299,604.74/482.76
  6. Step 6: Final answer
    x = 620.61

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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.