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Finding the Fourth Proportional to 505.70, 759.30 and 480.94

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Solution

The fourth proportional to 505.70, 759.30 and 480.94 is: 722.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.70 : 759.30 = 480.94 : x
  2. Step 2: Convert to fraction form
    505.70/759.30 = 480.94/x
  3. Step 3: Cross multiply
    505.70x = 759.30 × 480.94
  4. Step 4: Simplify right side
    505.70x = 365,177.74
  5. Step 5: Solve for x
    x = 365,177.74/505.70
  6. Step 6: Final answer
    x = 722.12

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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.