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Finding the Fourth Proportional to 603.06, 831.39 and 486.42

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Solution

The fourth proportional to 603.06, 831.39 and 486.42 is: 670.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.06 : 831.39 = 486.42 : x
  2. Step 2: Convert to fraction form
    603.06/831.39 = 486.42/x
  3. Step 3: Cross multiply
    603.06x = 831.39 × 486.42
  4. Step 4: Simplify right side
    603.06x = 404,404.72
  5. Step 5: Solve for x
    x = 404,404.72/603.06
  6. Step 6: Final answer
    x = 670.59

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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.