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Finding the Fourth Proportional to 1,982.95, 2,975.45 and 873.15

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Solution

The fourth proportional to 1,982.95, 2,975.45 and 873.15 is: 1,310.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.95 : 2,975.45 = 873.15 : x
  2. Step 2: Convert to fraction form
    1,982.95/2,975.45 = 873.15/x
  3. Step 3: Cross multiply
    1,982.95x = 2,975.45 × 873.15
  4. Step 4: Simplify right side
    1,982.95x = 2,598,014.17
  5. Step 5: Solve for x
    x = 2,598,014.17/1,982.95
  6. Step 6: Final answer
    x = 1,310.18

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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.