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Finding the Fourth Proportional to 505.26, 757.38 and 402.72

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Solution

The fourth proportional to 505.26, 757.38 and 402.72 is: 603.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.26 : 757.38 = 402.72 : x
  2. Step 2: Convert to fraction form
    505.26/757.38 = 402.72/x
  3. Step 3: Cross multiply
    505.26x = 757.38 × 402.72
  4. Step 4: Simplify right side
    505.26x = 305,012.07
  5. Step 5: Solve for x
    x = 305,012.07/505.26
  6. Step 6: Final answer
    x = 603.67

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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.