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Finding the Fourth Proportional to 2,485.44, 3,727.80 and 841.68

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Solution

The fourth proportional to 2,485.44, 3,727.80 and 841.68 is: 1,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.44 : 3,727.80 = 841.68 : x
  2. Step 2: Convert to fraction form
    2,485.44/3,727.80 = 841.68/x
  3. Step 3: Cross multiply
    2,485.44x = 3,727.80 × 841.68
  4. Step 4: Simplify right side
    2,485.44x = 3,137,614.70
  5. Step 5: Solve for x
    x = 3,137,614.70/2,485.44
  6. Step 6: Final answer
    x = 1,262.40

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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.