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Finding the Fourth Proportional to 759.05, 1,138.40 and 238.98

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Solution

The fourth proportional to 759.05, 1,138.40 and 238.98 is: 358.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.05 : 1,138.40 = 238.98 : x
  2. Step 2: Convert to fraction form
    759.05/1,138.40 = 238.98/x
  3. Step 3: Cross multiply
    759.05x = 1,138.40 × 238.98
  4. Step 4: Simplify right side
    759.05x = 272,055.43
  5. Step 5: Solve for x
    x = 272,055.43/759.05
  6. Step 6: Final answer
    x = 358.42

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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.