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Finding the Fourth Proportional to 1,181.81, 1,772.82 and 316.13

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Solution

The fourth proportional to 1,181.81, 1,772.82 and 316.13 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.81 : 1,772.82 = 316.13 : x
  2. Step 2: Convert to fraction form
    1,181.81/1,772.82 = 316.13/x
  3. Step 3: Cross multiply
    1,181.81x = 1,772.82 × 316.13
  4. Step 4: Simplify right side
    1,181.81x = 560,432.72
  5. Step 5: Solve for x
    x = 560,432.72/1,181.81
  6. Step 6: Final answer
    x = 474.21

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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.