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Finding the Fourth Proportional to 1,986.96, 2,981.40 and 1,503

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Solution

The fourth proportional to 1,986.96, 2,981.40 and 1,503 is: 2,255.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.96 : 2,981.40 = 1,503 : x
  2. Step 2: Convert to fraction form
    1,986.96/2,981.40 = 1,503/x
  3. Step 3: Cross multiply
    1,986.96x = 2,981.40 × 1,503
  4. Step 4: Simplify right side
    1,986.96x = 4,481,044.20
  5. Step 5: Solve for x
    x = 4,481,044.20/1,986.96
  6. Step 6: Final answer
    x = 2,255.23

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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.