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Finding the Fourth Proportional to 231.15, 345.28 and 230.07

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Solution

The fourth proportional to 231.15, 345.28 and 230.07 is: 343.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.15 : 345.28 = 230.07 : x
  2. Step 2: Convert to fraction form
    231.15/345.28 = 230.07/x
  3. Step 3: Cross multiply
    231.15x = 345.28 × 230.07
  4. Step 4: Simplify right side
    231.15x = 79,437.99
  5. Step 5: Solve for x
    x = 79,437.99/231.15
  6. Step 6: Final answer
    x = 343.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.