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Finding the Fourth Proportional to 959.62, 1,439.26 and 266.12

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Solution

The fourth proportional to 959.62, 1,439.26 and 266.12 is: 399.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.62 : 1,439.26 = 266.12 : x
  2. Step 2: Convert to fraction form
    959.62/1,439.26 = 266.12/x
  3. Step 3: Cross multiply
    959.62x = 1,439.26 × 266.12
  4. Step 4: Simplify right side
    959.62x = 383,015.87
  5. Step 5: Solve for x
    x = 383,015.87/959.62
  6. Step 6: Final answer
    x = 399.13

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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.