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Finding the Fourth Proportional to 2,408.91, 3,611.80 and 948.21

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Solution

The fourth proportional to 2,408.91, 3,611.80 and 948.21 is: 1,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.91 : 3,611.80 = 948.21 : x
  2. Step 2: Convert to fraction form
    2,408.91/3,611.80 = 948.21/x
  3. Step 3: Cross multiply
    2,408.91x = 3,611.80 × 948.21
  4. Step 4: Simplify right side
    2,408.91x = 3,424,744.88
  5. Step 5: Solve for x
    x = 3,424,744.88/2,408.91
  6. Step 6: Final answer
    x = 1,421.70

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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.