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Finding the Fourth Proportional to 3,614.81, 4,990.21 and 2,805.46

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Solution

The fourth proportional to 3,614.81, 4,990.21 and 2,805.46 is: 3,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,614.81 : 4,990.21 = 2,805.46 : x
  2. Step 2: Convert to fraction form
    3,614.81/4,990.21 = 2,805.46/x
  3. Step 3: Cross multiply
    3,614.81x = 4,990.21 × 2,805.46
  4. Step 4: Simplify right side
    3,614.81x = 13,999,815.06
  5. Step 5: Solve for x
    x = 13,999,815.06/3,614.81
  6. Step 6: Final answer
    x = 3,872.91

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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.