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Finding the Fourth Proportional to 3,424.60, 5,136.90 and 959.50

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Solution

The fourth proportional to 3,424.60, 5,136.90 and 959.50 is: 1,439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,424.60 : 5,136.90 = 959.50 : x
  2. Step 2: Convert to fraction form
    3,424.60/5,136.90 = 959.50/x
  3. Step 3: Cross multiply
    3,424.60x = 5,136.90 × 959.50
  4. Step 4: Simplify right side
    3,424.60x = 4,928,855.55
  5. Step 5: Solve for x
    x = 4,928,855.55/3,424.60
  6. Step 6: Final answer
    x = 1,439.25

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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.