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Finding the Fourth Proportional to 3,181.84, 4,771.22 and 990.58

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Solution

The fourth proportional to 3,181.84, 4,771.22 and 990.58 is: 1,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.84 : 4,771.22 = 990.58 : x
  2. Step 2: Convert to fraction form
    3,181.84/4,771.22 = 990.58/x
  3. Step 3: Cross multiply
    3,181.84x = 4,771.22 × 990.58
  4. Step 4: Simplify right side
    3,181.84x = 4,726,275.11
  5. Step 5: Solve for x
    x = 4,726,275.11/3,181.84
  6. Step 6: Final answer
    x = 1,485.39

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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.