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Finding the Fourth Proportional to 3,614.81, 4,986.40 and 2,122.44

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Solution

The fourth proportional to 3,614.81, 4,986.40 and 2,122.44 is: 2,927.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,614.81 : 4,986.40 = 2,122.44 : x
  2. Step 2: Convert to fraction form
    3,614.81/4,986.40 = 2,122.44/x
  3. Step 3: Cross multiply
    3,614.81x = 4,986.40 × 2,122.44
  4. Step 4: Simplify right side
    3,614.81x = 10,583,320.76
  5. Step 5: Solve for x
    x = 10,583,320.76/3,614.81
  6. Step 6: Final answer
    x = 2,927.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.