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Finding the Fourth Proportional to 931.30, 1,396.94 and 237.96

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Solution

The fourth proportional to 931.30, 1,396.94 and 237.96 is: 356.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.30 : 1,396.94 = 237.96 : x
  2. Step 2: Convert to fraction form
    931.30/1,396.94 = 237.96/x
  3. Step 3: Cross multiply
    931.30x = 1,396.94 × 237.96
  4. Step 4: Simplify right side
    931.30x = 332,421.68
  5. Step 5: Solve for x
    x = 332,421.68/931.30
  6. Step 6: Final answer
    x = 356.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.