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Finding the Fourth Proportional to 307.23, 423.86 and 202.37

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Solution

The fourth proportional to 307.23, 423.86 and 202.37 is: 279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.23 : 423.86 = 202.37 : x
  2. Step 2: Convert to fraction form
    307.23/423.86 = 202.37/x
  3. Step 3: Cross multiply
    307.23x = 423.86 × 202.37
  4. Step 4: Simplify right side
    307.23x = 85,777.56
  5. Step 5: Solve for x
    x = 85,777.56/307.23
  6. Step 6: Final answer
    x = 279.20

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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.