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Finding the Fourth Proportional to 313.01, 431.81 and 202.53

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Solution

The fourth proportional to 313.01, 431.81 and 202.53 is: 279.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.01 : 431.81 = 202.53 : x
  2. Step 2: Convert to fraction form
    313.01/431.81 = 202.53/x
  3. Step 3: Cross multiply
    313.01x = 431.81 × 202.53
  4. Step 4: Simplify right side
    313.01x = 87,453.34
  5. Step 5: Solve for x
    x = 87,453.34/313.01
  6. Step 6: Final answer
    x = 279.39

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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.