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Finding the Fourth Proportional to 3,591.79, 5,387.99 and 959.69

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Solution

The fourth proportional to 3,591.79, 5,387.99 and 959.69 is: 1,439.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,591.79 : 5,387.99 = 959.69 : x
  2. Step 2: Convert to fraction form
    3,591.79/5,387.99 = 959.69/x
  3. Step 3: Cross multiply
    3,591.79x = 5,387.99 × 959.69
  4. Step 4: Simplify right side
    3,591.79x = 5,170,808.79
  5. Step 5: Solve for x
    x = 5,170,808.79/3,591.79
  6. Step 6: Final answer
    x = 1,439.62

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1.5x scale

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.