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Finding the Fourth Proportional to 959.56, 1,439.30 and 266.27

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Solution

The fourth proportional to 959.56, 1,439.30 and 266.27 is: 399.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.56 : 1,439.30 = 266.27 : x
  2. Step 2: Convert to fraction form
    959.56/1,439.30 = 266.27/x
  3. Step 3: Cross multiply
    959.56x = 1,439.30 × 266.27
  4. Step 4: Simplify right side
    959.56x = 383,243.98
  5. Step 5: Solve for x
    x = 383,243.98/959.56
  6. Step 6: Final answer
    x = 399.39

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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.