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Finding the Fourth Proportional to 506.51, 759.50 and 485.21

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Solution

The fourth proportional to 506.51, 759.50 and 485.21 is: 727.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.51 : 759.50 = 485.21 : x
  2. Step 2: Convert to fraction form
    506.51/759.50 = 485.21/x
  3. Step 3: Cross multiply
    506.51x = 759.50 × 485.21
  4. Step 4: Simplify right side
    506.51x = 368,517.00
  5. Step 5: Solve for x
    x = 368,517.00/506.51
  6. Step 6: Final answer
    x = 727.56

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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.