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Finding the Fourth Proportional to 538.89, 807.99 and 415.17

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Solution

The fourth proportional to 538.89, 807.99 and 415.17 is: 622.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.89 : 807.99 = 415.17 : x
  2. Step 2: Convert to fraction form
    538.89/807.99 = 415.17/x
  3. Step 3: Cross multiply
    538.89x = 807.99 × 415.17
  4. Step 4: Simplify right side
    538.89x = 335,453.21
  5. Step 5: Solve for x
    x = 335,453.21/538.89
  6. Step 6: Final answer
    x = 622.49

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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.