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Finding the Fourth Proportional to 427.22, 587.81 and 415.13

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Solution

The fourth proportional to 427.22, 587.81 and 415.13 is: 571.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.22 : 587.81 = 415.13 : x
  2. Step 2: Convert to fraction form
    427.22/587.81 = 415.13/x
  3. Step 3: Cross multiply
    427.22x = 587.81 × 415.13
  4. Step 4: Simplify right side
    427.22x = 244,013.33
  5. Step 5: Solve for x
    x = 244,013.33/427.22
  6. Step 6: Final answer
    x = 571.16

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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.