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Finding the Fourth Proportional to 323.12, 484.72 and 117.78

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Solution

The fourth proportional to 323.12, 484.72 and 117.78 is: 176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.12 : 484.72 = 117.78 : x
  2. Step 2: Convert to fraction form
    323.12/484.72 = 117.78/x
  3. Step 3: Cross multiply
    323.12x = 484.72 × 117.78
  4. Step 4: Simplify right side
    323.12x = 57,090.32
  5. Step 5: Solve for x
    x = 57,090.32/323.12
  6. Step 6: Final answer
    x = 176.68

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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.