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Finding the Fourth Proportional to 370.93, 511.78 and 231.11

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Solution

The fourth proportional to 370.93, 511.78 and 231.11 is: 318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.93 : 511.78 = 231.11 : x
  2. Step 2: Convert to fraction form
    370.93/511.78 = 231.11/x
  3. Step 3: Cross multiply
    370.93x = 511.78 × 231.11
  4. Step 4: Simplify right side
    370.93x = 118,277.48
  5. Step 5: Solve for x
    x = 118,277.48/370.93
  6. Step 6: Final answer
    x = 318.87

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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.