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Finding the Fourth Proportional to 3,181.77, 4,772.10 and 841.80

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Solution

The fourth proportional to 3,181.77, 4,772.10 and 841.80 is: 1,262.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.77 : 4,772.10 = 841.80 : x
  2. Step 2: Convert to fraction form
    3,181.77/4,772.10 = 841.80/x
  3. Step 3: Cross multiply
    3,181.77x = 4,772.10 × 841.80
  4. Step 4: Simplify right side
    3,181.77x = 4,017,153.78
  5. Step 5: Solve for x
    x = 4,017,153.78/3,181.77
  6. Step 6: Final answer
    x = 1,262.55

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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.