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Finding the Fourth Proportional to 1,993.86, 2,991.15 and 898.74

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Solution

The fourth proportional to 1,993.86, 2,991.15 and 898.74 is: 1,348.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.86 : 2,991.15 = 898.74 : x
  2. Step 2: Convert to fraction form
    1,993.86/2,991.15 = 898.74/x
  3. Step 3: Cross multiply
    1,993.86x = 2,991.15 × 898.74
  4. Step 4: Simplify right side
    1,993.86x = 2,688,266.15
  5. Step 5: Solve for x
    x = 2,688,266.15/1,993.86
  6. Step 6: Final answer
    x = 1,348.27

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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.