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Finding the Fourth Proportional to 307, 423.36 and 202.06

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Solution

The fourth proportional to 307, 423.36 and 202.06 is: 278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    307 : 423.36 = 202.06 : x
  2. Step 2: Convert to fraction form
    307/423.36 = 202.06/x
  3. Step 3: Cross multiply
    307x = 423.36 × 202.06
  4. Step 4: Simplify right side
    307x = 85,544.12
  5. Step 5: Solve for x
    x = 85,544.12/307
  6. Step 6: Final answer
    x = 278.65

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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.