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Finding the Fourth Proportional to 485.62, 669.75 and 338.62

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Solution

The fourth proportional to 485.62, 669.75 and 338.62 is: 467.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.62 : 669.75 = 338.62 : x
  2. Step 2: Convert to fraction form
    485.62/669.75 = 338.62/x
  3. Step 3: Cross multiply
    485.62x = 669.75 × 338.62
  4. Step 4: Simplify right side
    485.62x = 226,790.75
  5. Step 5: Solve for x
    x = 226,790.75/485.62
  6. Step 6: Final answer
    x = 467.01

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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.