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Finding the Fourth Proportional to 484.86, 668.52 and 386.49

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Solution

The fourth proportional to 484.86, 668.52 and 386.49 is: 532.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.86 : 668.52 = 386.49 : x
  2. Step 2: Convert to fraction form
    484.86/668.52 = 386.49/x
  3. Step 3: Cross multiply
    484.86x = 668.52 × 386.49
  4. Step 4: Simplify right side
    484.86x = 258,376.29
  5. Step 5: Solve for x
    x = 258,376.29/484.86
  6. Step 6: Final answer
    x = 532.89

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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.